xterm

XTERM(1)                         X Window System                        XTERM(1)



NAME
       xterm - terminal emulator for X

SYNOPSIS
       xterm [-toolkitoption ...] [-option ...] [shell]

DESCRIPTION
       The xterm program is a terminal emulator for the X Window System.  It
       provides DEC VT102/VT220 and selected features from higher-level
       terminals such as VT320/VT420/VT520 (VTxxx).  It also provides Tektronix
       4014 emulation for programs that cannot use the window system directly.
       If the underlying operating system supports terminal resizing
       capabilities (for example, the SIGWINCH signal in systems derived from
       4.3BSD), xterm will use the facilities to notify programs running in the
       window whenever it is resized.

       The VTxxx and Tektronix 4014 terminals each have their own window so that
       you can edit text in one and look at graphics in the other at the same
       time.  To maintain the correct aspect ratio (height/width), Tektronix
       graphics will be restricted to the largest box with a 4014's aspect ratio
       that will fit in the window.  This box is located in the upper left area
       of the window.

       Although both windows may be displayed at the same time, one of them is
       considered the “active” window for receiving keyboard input and terminal
       output.  This is the window that contains the text cursor.  The active
       window can be chosen through escape sequences, the VT Options menu in the
       VTxxx window, and the Tek Options menu in the 4014 window.

EMULATIONS
       Xterm provides usable emulations of related DEC terminals:

       •   VT52 emulation is complete.

       •   VT102 emulation is fairly complete, but does not support autorepeat
           (because that would affect the keyboard used by other X clients).

           Double-size characters are displayed properly if your font server
           supports scalable bitmap fonts.

       •   VT220 emulation does not support soft fonts, it is otherwise
           complete.

       •   VT420 emulation (the default) supports controls for manipulating
           rectangles of characters as well as left/right margins.

           Xterm does not support some other features which are not suitable for
           emulation, e.g., two-sessions.

       Terminal database (terminfo (5) or termcap (5)) entries that work with
       xterm include

              an optional platform-specific entry (“xterm”),
              “xterm”,
              “vt102”,
              “vt100”,
              “ansi” and
              “dumb”

       Xterm automatically searches the terminal database in this order for
       these entries and then sets the “TERM” variable (and the “TERMCAP”
       environment variable on a few older systems).  The alternatives after
       “xterm” are very old, from the late 1980s.

       VT100 and VT102 emulations are commonly equated, though they actually
       differ.  The VT102 provided controls for inserting and deleting lines.

       Similarly, “ansi” and “vt100” are often equated.  These are not really
       the same.  For instance, they use different controls for scrolling (but
       xterm supports both).  These features differ in an “ansi” terminal
       description from xterm:

       acsc
               Pseudo-graphics (line-drawing) uses a different mapping.

       xenl
               Xterm wraps text at the right margin using the VT100 “newline
               glitch” behavior.

       Because of the wrapping behavior, you would occasionally have to repaint
       the screen when using a text editor with the “ansi” description.

       You may also use descriptions corresponding to the various supported
       emulations such as “vt220” or  “vt420”, but should set the terminal
       emulation level with the decTerminalID resource.

       On most systems, xterm will use the terminfo database.  Some older
       systems use termcap.  (The “TERMCAP” environment variable is not set if
       xterm is linked against a terminfo library, since the requisite
       information is not provided by the termcap emulation of terminfo
       libraries).

       Many of the special xterm features may be modified under program control
       through a set of escape sequences different from the standard VTxxx
       escape sequences (see Xterm Control Sequences).

       The Tektronix 4014 emulation is also fairly good.  It supports 12-bit
       graphics addressing, scaled to the window size.  Four different font
       sizes and five different lines types are supported.  There is no write-
       through or defocused mode support.  The Tektronix text and graphics
       commands are recorded internally by xterm and may be written to a file by
       sending the COPY escape sequence (or through the Tektronix menu; see
       below).  The name of the file will be

           “COPYyyyy-MM-dd.hh:mm:ss”

       where yyyy, MM, dd, hh, mm and ss are the year, month, day, hour, minute
       and second when the COPY was performed (the file is created in the
       directory xterm is started in, or the home directory for a login xterm).

       Not all of the features described in this manual are necessarily
       available in this version of xterm.  Some (e.g., the non-VT220
       extensions) are available only if they were compiled in, though the most
       commonly-used are in the default configuration.

OTHER FEATURES
       Xterm automatically highlights the text cursor when the pointer enters
       the window (selected) and unhighlights it when the pointer leaves the
       window (unselected).  If the window is the focus window, then the text
       cursor is highlighted no matter where the pointer is.

       In VTxxx mode, there are escape sequences to activate and deactivate an
       alternate screen buffer, which is the same size as the display area of
       the window.  When activated, the current screen is saved and replaced
       with the alternate screen.  Saving of lines scrolled off the top of the
       window is disabled until the normal screen is restored.  The usual
       terminal description for xterm allows the visual editor vi(1) to switch
       to the alternate screen for editing and to restore the screen on exit.  A
       popup menu entry makes it simple to switch between the normal and
       alternate screens for cut and paste.

       In either VTxxx or Tektronix mode, there are escape sequences to change
       the name of the windows.  Additionally, in VTxxx mode, xterm implements
       the window-manipulation control sequences from dtterm, such as resizing
       the window, setting its location on the screen.

       Xterm allows character-based applications to receive mouse events
       (currently button-press and release events, and button-motion events) as
       keyboard control sequences.  See Xterm Control Sequences for details.

OPTIONS
       Because xterm uses the X Toolkit library, it accepts the standard X
       Toolkit command line options.  Xterm also accepts many application-
       specific options.

       By convention, if an option begins with a “+” instead of a “-”, the
       option is restored to its default value.

       Most of the xterm options are actually parsed by the X Toolkit, which
       sets resource values, and overrides corresponding resource-settings in
       your X resource files.  Xterm provides the X Toolkit with a table of
       options.  A few of these are marked, telling the X Toolkit to ignore them
       (-help, -version, -class, -e, and -into).  After the X Toolkit has parsed
       the command-line parameters, it removes those which it handles, leaving
       the specially-marked parameters for xterm to handle.

       These options do not set a resource value, and are handled specially:

       -version
               This causes xterm to print a version number to the standard
               output, and then exit.

       -help   This causes xterm to print out a verbose message describing its
               options, one per line.  The message is written to the standard
               output.  After printing the message, xterm exits.  Xterm
               generates this message, sorting it and noting whether a “-option”
               or a “+option” turns the feature on or off, since some features
               historically have been one or the other.  Xterm generates a
               concise help message (multiple options per line) when an unknown
               option is used, e.g.,

                   xterm -z

               If the logic for a particular option such as logging is not
               compiled into xterm, the help text for that option also is not
               displayed by the -help option.

       The -version and -help options are interpreted even if xterm cannot open
       the display, and are useful for testing and configuration scripts.  Along
       with -class, they are checked before other options.  To do this, xterm
       has its own (much simpler) argument parser, along with a table of the X
       Toolkit's built-in list of options.

       Relying upon the X Toolkit to parse the options and associated values has
       the advantages of simplicity and good integration with the X resource
       mechanism.  There are a few drawbacks

       •   Xterm cannot tell easily whether a resource value was set by one of
           the external resource- or application-defaults files, whether it was
           set using xrdb(1), or if it was set through the -xrm option or via
           some directly relevant command-line option.  Xterm sees only the end-
           result: a value supplied when creating its widgets.

       •   Xterm does not know the order in which particular options and items
           in resource files are evaluated.  Rather, it sees all of the values
           for a given widget at the same time.  In the design of these options,
           some are deemed more important, and can override other options.

           The X Toolkit uses patterns (constants and wildcards) to match
           resources.  Once a particular pattern has been used, it will not
           modify it.  To override a given setting, a more-specific pattern must
           be used, e.g., replacing “*” with “.”.  Some poorly-designed resource
           files are too specific to allow the command-line options to affect
           the relevant widget values.

       •   In a few cases, the X Toolkit combines its standard options in ways
           which do not work well with xterm.  This happens with the color (-fg,
           -bg) and reverse (-rv) options.  Xterm makes a special case of these
           and adjusts its sense of “reverse” to lessen user surprise.

       One parameter (after all options) may be given.  That overrides xterm's
       built-in choice of shell program:

       •   If the parameter is not a relative path, i.e., beginning with “./” or
           “../”, xterm looks for the file in the user's PATH.  In either case,
           this check fails if xterm cannot construct an absolute path.

       •   If that check fails (or if no such parameter is given), xterm next
           checks the “SHELL” variable.  If that specifies an executable file,
           xterm will attempt to start that.  However, xterm additionally checks
           if it is a valid shell, and will unset “SHELL” if it is not.

       •   If “SHELL” is not set to an executable file, xterm tries to use the
           shell program specified in the user's password file entry.  As
           before, xterm verifies if this is a valid shell.

       •   Finally, if the password file entry does not specify a valid shell,
           xterm uses /bin/sh.

       The -e option cannot be used with this parameter since it uses all
       parameters following the option.

       Xterm validates shell programs by finding their pathname in the text file
       /etc/shells.  It treats the environment variable “SHELL” specially
       because (like “TERM”), xterm both reads and updates the variable, and
       because the program started by xterm is not necessarily a shell.

       The other options are used to control the appearance and behavior.  Not
       all options are necessarily configured into your copy of xterm:

       -132    Normally, the VT102 DECCOLM escape sequence that switches between
               80 and 132 column mode is ignored.  This option causes the
               DECCOLM escape sequence to be recognized, and the xterm window
               will resize appropriately.

       -ah     This option indicates that xterm should always highlight the text
               cursor.  By default, xterm will display a hollow text cursor
               whenever the focus is lost or the pointer leaves the window.

       +ah     This option indicates that xterm should do text cursor
               highlighting based on focus.

       -ai     This option disables active icon support if that feature was
               compiled into xterm.  This is equivalent to setting the vt100
               resource activeIcon to “false”.

       +ai     This option enables active icon support if that feature was
               compiled into xterm.  This is equivalent to setting the vt100
               resource activeIcon to “true”.

       -aw     This option indicates that auto-wraparound should be allowed, and
               is equivalent to setting the vt100 resource autoWrap to “true”.

               Auto-wraparound allows the cursor to automatically wrap to the
               beginning of the next line when it is at the rightmost position
               of a line and text is output.

       +aw     This option indicates that auto-wraparound should not be allowed,
               and is equivalent to setting the vt100 resource autoWrap to
               “false”.

       -b number
               This option specifies the size of the inner border (the distance
               between the outer edge of the characters and the window border)
               in pixels.  That is the vt100 internalBorder resource.  The
               default is “2”.

       -baudrate number
               Set the line-speed, used to test the behavior of applications
               that use the line-speed when optimizing their output to the
               screen.  The default is “38400”.

       -bc     turn on text cursor blinking.  This overrides the cursorBlink
               resource.

       +bc     turn off text cursor blinking.  This overrides the cursorBlink
               resource.

       -bcf milliseconds
               set the amount of time text cursor is off when blinking via the
               cursorOffTime resource.

       -bcn milliseconds
               set the amount of time text cursor is on when blinking via the
               cursorOnTime resource.

       -bdc    Set the vt100 resource colorBDMode to “false”, disabling the
               display of characters with bold attribute as color.

       +bdc    Set the vt100 resource colorBDMode to “true”, enabling the
               display of characters with bold attribute as color rather than
               bold.

       -cb     Set the vt100 resource cutToBeginningOfLine to “false”.

       +cb     Set the vt100 resource cutToBeginningOfLine to “true”.

       -cc characterclassrange:value[, ...]
               This sets classes indicated by the given ranges for using in
               selecting by words (see CHARACTER CLASSES and the charClass
               resource).

       -cjk_width
               Set the cjkWidth resource to “true”.  When turned on, characters
               with East Asian Ambiguous (A) category in UTR 11 have a column
               width of 2.  Otherwise, they have a column width of 1.  This may
               be useful for some legacy CJK text terminal-based programs
               assuming box drawings and others to have a column width of 2.  It
               also should be turned on when you specify a TrueType CJK double-
               width (bi-width/monospace) font either with -fa at the command
               line or faceName resource.  The default is “false”

       +cjk_width
               Reset the cjkWidth resource.

       -class string
               This option allows you to override xterm's resource class.
               Normally it is “XTerm”, but can be set to another class such as
               “UXTerm” to override selected resources.

               X Toolkit sets the WM_CLASS property using the instance name and
               this class value.

       -cm     This option disables recognition of ANSI color-change escape
               sequences.  It sets the colorMode resource to “false”.

       +cm     This option enables recognition of ANSI color-change escape
               sequences.  This is the same as the vt100 resource colorMode.

       -cn     This option indicates that newlines should not be cut in line-
               mode selections.  It sets the cutNewline resource to “false”.

       +cn     This option indicates that newlines should be cut in line-mode
               selections.  It sets the cutNewline resource to “true”.

       -cr color
               This option specifies the color to use for text cursor.  The
               default is to use the same foreground color that is used for
               text.  It sets the cursorColor resource according to the
               parameter.

       -cu     This option indicates that xterm should work around a bug in the
               more(1) program that causes it to incorrectly display lines that
               are exactly the width of the window and are followed by a line
               beginning with a tab (the leading tabs are not displayed).  This
               option is so named because it was originally thought to be a bug
               in the curses(3x) cursor motion package.

       +cu     This option indicates that xterm should not work around the
               more(1) bug mentioned above.

       -dc     This option disables the escape sequence to change dynamic
               colors: the vt100 foreground and background colors, its text
               cursor color, the pointer cursor foreground and background
               colors, the Tektronix emulator foreground and background colors,
               its text cursor color and highlight color.  The option sets the
               dynamicColors option to “false”.

       +dc     This option enables the escape sequence to change dynamic colors.
               The option sets the dynamicColors option to “true”.

       -e program [ arguments ... ]
               This option specifies the program (and its command line
               arguments) to be run in the xterm window.  It also sets the
               window title and icon name to be the basename of the program
               being executed if neither -T nor -n are given on the command
               line.

               NOTE: This must be the last option on the command line.

       -en encoding
               This option determines the encoding on which xterm runs.  It sets
               the locale resource.  Encodings other than UTF-8 are supported by
               using luit.  The -lc option should be used instead of -en for
               systems with locale support.

       -fa pattern
               This option sets the pattern for fonts selected from the FreeType
               library if support for that library was compiled into xterm.
               This corresponds to the faceName resource.  When a CJK double-
               width font is specified, you also need to turn on the cjkWidth
               resource.

               If you specify both -fa and the X Toolkit option -fn, the -fa
               setting overrides the latter.

               See also the renderFont resource, which combines with this to
               determine whether FreeType fonts are initially active.

       -fb font
               This option specifies a font to be used when displaying bold
               text.  It sets the boldFont resource.

               This font must be the same height and width as the normal font,
               otherwise it is ignored.  If only one of the normal or bold fonts
               is specified, it will be used as the normal font and the bold
               font will be produced by overstriking this font.

               See also the discussion of boldMode and alwaysBoldMode resources.

       -fbb    This option indicates that xterm should compare normal and bold
               fonts bounding boxes to ensure they are compatible.  It sets the
               freeBoldBox resource to “false”.

       +fbb    This option indicates that xterm should not compare normal and
               bold fonts bounding boxes to ensure they are compatible.  It sets
               the freeBoldBox resource to “true”.

       -fbx    This option indicates that xterm should not assume that the
               normal and bold fonts have VT100 line-drawing characters.  If any
               are missing, xterm will draw the characters directly.  It sets
               the forceBoxChars resource to “false”.

       +fbx    This option indicates that xterm should assume that the normal
               and bold fonts have VT100 line-drawing characters.  It sets the
               forceBoxChars resource to “true”.

       -fd pattern
               This option sets the pattern for double-width fonts selected from
               the FreeType library if support for that library was compiled
               into xterm.  This corresponds to the faceNameDoublesize resource.

       -fi font
               This option sets the font for active icons if that feature was
               compiled into xterm.

               See also the discussion of the iconFont resource.

       -fs size
               This option sets the pointsize for fonts selected from the
               FreeType library if support for that library was compiled into
               xterm.  This corresponds to the faceSize resource.

       -fullscreen
               This option indicates that xterm should ask the window manager to
               let it use the full-screen for display, e.g., without window
               decorations.  It sets the fullscreen resource to “true”.

       +fullscreen
               This option indicates that xterm should not ask the window
               manager to let it use the full-screen for display.  It sets the
               fullscreen resource to “false”.

       -fw font
               This option specifies the font to be used for displaying wide
               text.  By default, it will attempt to use a font twice as wide as
               the font that will be used to draw normal text.  If no double-
               width font is found, it will improvise, by stretching the normal
               font.  This corresponds to the wideFont resource.

       -fwb font
               This option specifies the font to be used for displaying bold
               wide text.  By default, it will attempt to use a font twice as
               wide as the font that will be used to draw bold text.  If no
               double-width font is found, it will improvise, by stretching the
               bold font.  This corresponds to the wideBoldFont resource.

       -fx font
               This option specifies the font to be used for displaying the
               preedit string in the “OverTheSpot” input method.

               See also the discussion of the ximFont resource.

       -hc color
               (see -selbg).

       -hf     This option indicates that HP function key escape codes should be
               generated for function keys.  It sets the hpFunctionKeys resource
               to “true”.

       +hf     This option indicates that HP function key escape codes should
               not be generated for function keys.  It sets the hpFunctionKeys
               resource to “false”.

       -hm     Tells xterm to use highlightTextColor and highlightColor to
               override the reversed foreground/background colors in a
               selection.  It sets the highlightColorMode resource to “true”.

       +hm     Tells xterm not to use highlightTextColor and highlightColor to
               override the reversed foreground/background colors in a
               selection.  It sets the highlightColorMode resource to “false”.

       -hold   Turn on the hold resource, i.e., xterm will not immediately
               destroy its window when the shell command completes.  It will
               wait until you use the window manager to destroy/kill the window,
               or if you use the menu entries that send a signal, e.g., HUP or
               KILL.

       +hold   Turn off the hold resource, i.e., xterm will immediately destroy
               its window when the shell command completes.

       -ie     Turn on the ptyInitialErase resource, i.e., use the pseudo-
               terminal's sense of the stty erase value.

       +ie     Turn off the ptyInitialErase resource, i.e., set the stty erase
               value using the kb string from the termcap entry as a reference,
               if available.

       -im     Turn on the useInsertMode resource, which forces use of insert
               mode by adding appropriate entries to the TERMCAP environment
               variable.  (This option is ignored on most systems, because
               TERMCAP is not used).

       +im     Turn off the useInsertMode resource.

       -into windowId
               Given an X window identifier (an integer, which can be
               hexadecimal, octal or decimal according to whether it begins with
               "0x", "0" or neither), xterm will reparent its top-level shell
               widget to that window.  This is used to embed xterm within other
               applications.

               For instance, there are scripts for Tcl/Tk and Gtk which can be
               used to demonstrate the feature.  When using Gtk, there is a
               limitation of that toolkit which requires that xterm's
               allowSendEvents resource is enabled.

       -itc    Set the vt100 resource colorITMode to “false”, disabling the
               display of characters with italic attribute as color.

       +itc    Set the vt100 resource colorITMode to “true”, enabling the
               display of characters with italic attribute as color rather than
               italic.

       -j      This option indicates that xterm should do jump scrolling.  It
               corresponds to the jumpScroll resource.  Normally, text is
               scrolled one line at a time; this option allows xterm to move
               multiple lines at a time so that it does not fall as far behind.
               Its use is strongly recommended since it makes xterm much faster
               when scanning through large amounts of text.  The VT100 escape
               sequences for enabling and disabling smooth scroll as well as the
               VT Options menu can be used to turn this feature on or off.

       +j      This option indicates that xterm should not do jump scrolling.

       -k8     This option sets the allowC1Printable resource.  When
               allowC1Printable is set, xterm overrides the mapping of C1
               control characters (code 128–159) to treat them as printable.

       +k8     This option resets the allowC1Printable resource.

       -kt keyboardtype
               This option sets the keyboardType resource.  Possible values
               include: “unknown”, “default”, “legacy”, “hp”, “sco”, “sun”,
               “tcap” and “vt220”.

               The value “unknown”, causes the corresponding resource to be
               ignored.

               The value “default”, suppresses the associated resources

               hpFunctionKeys,
               scoFunctionKeys,
               sunFunctionKeys,
               tcapFunctionKeys,
               oldXtermFKeys and
               sunKeyboard,

               using the Sun/PC keyboard layout.

       -l      Turn logging on, unless disabled by the logInhibit resource.

               Some versions of xterm may have logging enabled.  However,
               normally logging is not supported, due to security concerns in
               the early 1990s.  That was a problem in X11R4 xterm (1989) which
               was addressed by a patch to X11R5 late in 1993.  X11R6 included
               these fixes.  The older version (when running with root
               privilege) would create the log file using root privilege.  The
               reason why xterm ran with root privileges was to open pseudo-
               terminals.  Those privileges are now needed only on very old
               systems: Unix98 pseudo-terminals made the BSD scheme unnecessary.

               Unless overridden by the -lf option or the logFile resource:

               •   If the filename is “-”, then logging is sent to the standard
                   output.

               •   Otherwise a filename is generated, and the log file is
                   written to the directory from which xterm is invoked.

               •   The generated filename is of the form

                       XtermLog.XXXXXX

                   or

                       Xterm.log.hostname.yyyy.mm.dd.hh.mm.ss.XXXXXX

                   depending on how xterm was built.

       +l      Turn logging off.

       -lc     Turn on support of various encodings according to the users'
               locale setting, i.e., LC_ALL, LC_CTYPE, or LANG environment
               variables.  This is achieved by turning on UTF-8 mode and by
               invoking luit for conversion between locale encodings and UTF-8.
               (luit is not invoked in UTF-8 locales.)  This corresponds to the
               locale resource.

               The actual list of encodings which are supported is determined by
               luit.  Consult the luit manual page for further details.

               See also the discussion of the -u8 option which supports UTF-8
               locales.

       +lc     Turn off support of automatic selection of locale encodings.
               Conventional 8bit mode or, in UTF-8 locales or with -u8 option,
               UTF-8 mode will be used.

       -lcc path
               File name for the encoding converter from/to locale encodings and
               UTF-8 which is used with -lc option or locale resource.  This
               corresponds to the localeFilter resource.

       -leftbar
               Force scrollbar to the left side of VT100 screen.  This is the
               default, unless you have set the rightScrollBar resource.

       -lf filename
               Specify the log filename.  This sets the logFile resource.  If
               set to “-”, xterm writes its log to the standard output.  See the
               -l option.

       -ls     This option indicates that the shell that is started in the xterm
               window will be a login shell (i.e., the first character of
               argv[0] will be a dash, indicating to the shell that it should
               read the user's .login or .profile).

               The -ls flag and the loginShell resource are ignored if -e is
               also given, because xterm does not know how to make the shell
               start the given command after whatever it does when it is a login
               shell - the user's shell of choice need not be a Bourne shell
               after all.  Also, xterm -e is supposed to provide a consistent
               functionality for other applications that need to start text-mode
               programs in a window, and if loginShell were not ignored, the
               result of ~/.profile might interfere with that.

               If you do want the effect of -ls and -e simultaneously, you may
               get away with something like

                   xterm -e /bin/bash -l -c "my command here"

               Finally, -ls is not completely ignored, because xterm -ls -e does
               write a /etc/wtmp entry (if configured to do so), whereas
               xterm -e does not.

       +ls     This option indicates that the shell that is started should not
               be a login shell (i.e., it will be a normal “subshell”).

       -maximized
               This option indicates that xterm should ask the window manager to
               maximize its layout on startup.  This corresponds to the
               maximized resource.

               Maximizing is not the reverse of iconifying; it is possible to do
               both with certain window managers.

       +maximized
               This option indicates that xterm should ask the window manager to
               not maximize its layout on startup.

       -mb     This option indicates that xterm should ring a margin bell when
               the user types near the right end of a line.

       +mb     This option indicates that margin bell should not be rung.

       -mc milliseconds
               This option specifies the maximum time between multi-click
               selections.

       -mesg   Turn off the messages resource, i.e., disallow write access to
               the terminal.

       +mesg   Turn on the messages resource, i.e., allow write access to the
               terminal.

       -mk_width
               Set the mkWidth resource to “true”.  This makes xterm use a
               built-in version of the wide-character width calculation.  The
               default is “false”

       +mk_width
               Reset the mkWidth resource.

       -ms color
               This option specifies the color to be used for the pointer
               cursor.  The default is to use the foreground color.  This sets
               the pointerColor resource.

       -nb number
               This option specifies the number of characters from the right end
               of a line at which the margin bell, if enabled, will ring.  The
               default is “10”.

       -nul    This option disables the display of underlining.

       +nul    This option enables the display of underlining.

       -pc     This option enables the PC-style use of bold colors (see
               boldColors resource).

       +pc     This option disables the PC-style use of bold colors.

       -pf font
               This option specifies the font to be used for the pointer.  The
               corresponding resource name is pointerFont.  The resource value
               default is cursor.

       -pob    This option indicates that the window should be raised whenever a
               Control-G is received.

       +pob    This option indicates that the window should not be raised
               whenever a Control-G is received.

       -report-charclass
               Print a report to the standard output showing information about
               the character-classes which can be altered using the charClass
               resource.

       -report-colors
               Print a report to the standard output showing information about
               colors as xterm allocates them.  This corresponds to the
               reportColors resource.

       -report-fonts
               Print a report to the standard output showing information about
               fonts which are loaded.  This corresponds to the reportFonts
               resource.

       -report-icons
               Print a report to the standard output showing information about
               pixmap-icons which are loaded.  This corresponds to the
               reportIcons resource.

       -report-xres
               Print a report to the standard output showing the values of
               boolean, numeric or string X resources for the VT100 widget when
               initialization is complete.  This corresponds to the reportXRes
               resource.

       -rightbar
               Force scrollbar to the right side of VT100 screen.

       -rvc    This option disables the display of characters with reverse
               attribute as color.

       +rvc    This option enables the display of characters with reverse
               attribute as color.

       -rw     This option indicates that reverse-wraparound should be allowed.
               This allows the cursor to back up from the leftmost column of one
               line to the rightmost column of the previous line.  This is very
               useful for editing long shell command lines and is encouraged.
               This option can be turned on and off from the VT Options menu.

       +rw     This option indicates that reverse-wraparound should not be
               allowed.

       -s      This option indicates that xterm may scroll asynchronously,
               meaning that the screen does not have to be kept completely up to
               date while scrolling.  This allows xterm to run faster when
               network latencies are very high and is typically useful when
               running across a very large internet or many gateways.

       +s      This option indicates that xterm should scroll synchronously.

       -samename
               Does not send title and icon name change requests when the
               request would have no effect: the name is not changed.  This has
               the advantage of preventing flicker and the disadvantage of
               requiring an extra round trip to the server to find out the
               previous value.  In practice this should never be a problem.

       +samename
               Always send title and icon name change requests.

       -sb     This option indicates that some number of lines that are scrolled
               off the top of the window should be saved and that a scrollbar
               should be displayed so that those lines can be viewed.  This
               option may be turned on and off from the VT Options menu.

       +sb     This option indicates that a scrollbar should not be displayed.

       -selbg color
               This option specifies the color to use for the background of
               selected text.  If not specified, reverse video is used.  See the
               discussion of the highlightColor resource.

       -selfg color
               This option specifies the color to use for selected text.  If not
               specified, reverse video is used.  See the discussion of the
               highlightTextColor resource.

       -sf     This option indicates that Sun function key escape codes should
               be generated for function keys.

       +sf     This option indicates that the standard escape codes should be
               generated for function keys.

       -sh number
               scale line-height values by the given number.  See the discussion
               of the scaleHeight resource.

       -si     This option indicates that output to a window should not
               automatically reposition the screen to the bottom of the
               scrolling region.  This option can be turned on and off from the
               VT Options menu.

       +si     This option indicates that output to a window should cause it to
               scroll to the bottom.

       -sk     This option indicates that pressing a key while using the
               scrollbar to review previous lines of text should cause the
               window to be repositioned automatically in the normal position at
               the bottom of the scroll region.

       +sk     This option indicates that pressing a key while using the
               scrollbar should not cause the window to be repositioned.

       -sl number
               This option specifies the number of lines to save that have been
               scrolled off the top of the screen.  This corresponds to the
               saveLines resource.  The default is “1024”.

       -sm     This option, corresponding to the sessionMgt resource, indicates
               that xterm should set up session manager callbacks.

       +sm     This option indicates that xterm should not set up session
               manager callbacks.

       -sp     This option indicates that Sun/PC keyboard should be assumed,
               providing mapping for keypad “+” to “,”, and CTRL-F1 to F13,
               CTRL-F2 to F14, etc.

       +sp     This option indicates that the standard escape codes should be
               generated for keypad and function keys.

       -t      This option indicates that xterm should start in Tektronix mode,
               rather than in VTxxx mode.  Switching between the two windows is
               done using the “Options” menus.

               Terminal database (terminfo (5) or termcap (5)) entries that work
               with xterm are:

               “tek4014”,
               “tek4015”,
               “tek4012”,
               “tek4013”,
               “tek4010”, and
               “dumb”.

               Xterm automatically searches the terminal database in this order
               for these entries and then sets the “TERM” variable (and the
               “TERMCAP” environment variable, if relevant).

       +t      This option indicates that xterm should start in VTxxx mode.

       -tb     This option, corresponding to the toolBar resource, indicates
               that xterm should display a toolbar (or menubar) at the top of
               its window.  The buttons in the toolbar correspond to the popup
               menus, e.g., control/left/mouse for Main Options.

       +tb     This option indicates that xterm should not set up a toolbar.

       -ti term_id
               Specify the name used by xterm to select the correct response to
               terminal ID queries.  It also specifies the emulation level, used
               to determine the type of response to a DA control sequence.
               Valid values include vt52, vt100, vt101, vt102, vt220, and vt240
               (the “vt” is optional).  The default is “vt420”.  The term_id
               argument specifies the terminal ID to use.  (This is the same as
               the decTerminalID resource).

       -tm string
               This option specifies a series of terminal setting keywords
               followed by the characters that should be bound to those
               functions, similar to the stty program.  The keywords and their
               values are described in detail in the ttyModes resource.

       -tn name
               This option specifies the name of the terminal type to be set in
               the TERM environment variable.  It corresponds to the termName
               resource.  This terminal type must exist in the terminal database
               (termcap or terminfo, depending on how xterm is built) and should
               have li# and co# entries.  If the terminal type is not found,
               xterm uses the built-in list “xterm”, “vt102”, etc.

       -u8     This option sets the utf8 resource.  When utf8 is set, xterm
               interprets incoming data as UTF-8.  This sets the wideChars
               resource as a side-effect, but the UTF-8 mode set by this option
               prevents it from being turned off.  If you must turn UTF-8
               encoding on and off, use the -wc option or the corresponding
               wideChars resource, rather than the -u8 option.

               This option and the utf8 resource are overridden by the -lc and
               -en options and locale resource.  That is, if xterm has been
               compiled to support luit, and the locale resource is not “false”
               this option is ignored.  We recommend using the -lc option or the
               “locale: true” resource in UTF-8 locales when your operating
               system supports locale, or -en UTF-8 option or the
               “locale: UTF-8” resource when your operating system does not
               support locale.

       +u8     This option resets the utf8 resource.

       -uc     This option makes the cursor underlined instead of a box.

       +uc     This option makes the cursor a box instead of underlined.

       -ulc    This option disables the display of characters with underline
               attribute as color rather than with underlining.

       +ulc    This option enables the display of characters with underline
               attribute as color rather than with underlining.

       -ulit   This option, corresponding to the italicULMode resource, disables
               the display of characters with underline attribute as italics
               rather than with underlining.

       +ulit   This option, corresponding to the italicULMode resource, enables
               the display of characters with underline attribute as italics
               rather than with underlining.

       -ut     This option indicates that xterm should not write a record into
               the system utmp log file.

       +ut     This option indicates that xterm should write a record into the
               system utmp log file.

       -vb     This option indicates that a visual bell is preferred over an
               audible one.  Instead of ringing the terminal bell whenever a
               Control-G is received, the window will be flashed.

       +vb     This option indicates that a visual bell should not be used.

       -wc     This option sets the wideChars resource.

               When wideChars is set, xterm maintains internal structures for
               16-bit characters.  If xterm is not started in UTF-8 mode (or if
               this resource is not set), initially it maintains those
               structures to support 8-bit characters.  Xterm can later be
               switched, using a menu entry or control sequence, causing it to
               reallocate those structures to support 16-bit characters.

               The default is “false”.

       +wc     This option resets the wideChars resource.

       -wf     This option indicates that xterm should wait for the window to be
               mapped the first time before starting the subprocess so that the
               initial terminal size settings and environment variables are
               correct.  It is the application's responsibility to catch
               subsequent terminal size changes.

       +wf     This option indicates that xterm should not wait before starting
               the subprocess.

       -ziconbeep percent
               Same as zIconBeep resource.  If percent is non-zero, xterms that
               produce output while iconified will cause an XBell sound at the
               given volume and have “***” prepended to their icon titles.  Most
               window managers will detect this change immediately, showing you
               which window has the output.  (A similar feature was in x10
               xterm.)

       -C      This option indicates that this window should receive console
               output.  This is not supported on all systems.  To obtain console
               output, you must be the owner of the console device, and you must
               have read and write permission for it.  If you are running X
               under xdm on the console screen you may need to have the session
               startup and reset programs explicitly change the ownership of the
               console device in order to get this option to work.

       -Sccn   This option allows xterm to be used as an input and output
               channel for an existing program and is sometimes used in
               specialized applications.  The option value specifies the last
               few letters of the name of a pseudo-terminal to use in slave
               mode, plus the number of the inherited file descriptor.  If the
               option contains a “/” character, that delimits the characters
               used for the pseudo-terminal name from the file descriptor.
               Otherwise, exactly two characters are used from the option for
               the pseudo-terminal name, the remainder is the file descriptor.
               Examples (the first two are equivalent since the descriptor
               follows the last “/”):

                   -S/dev/pts/123/45
                   -S123/45
                   -Sab34

               Note that xterm does not close any file descriptor which it did
               not open for its own use.  It is possible (though probably not
               portable) to have an application which passes an open file
               descriptor down to xterm past the initialization or the -S option
               to a process running in the xterm.

   Old Options
       The following command line arguments are provided for compatibility with
       older versions.  They may not be supported in the next release as the X
       Toolkit provides standard options that accomplish the same task.

       %geom   This option specifies the preferred size and position of the
               Tektronix window.  It is shorthand for specifying the
               “tekGeometry” resource.

       #geom   This option specifies the preferred position of the icon window.
               It is shorthand for specifying the “iconGeometry” resource.

       -T string
               This option specifies the title for xterm's windows.  It is
               equivalent to -title.

       -n string
               This option specifies the icon name for xterm's windows.  It is
               shorthand for specifying the “iconName” resource.  Note that this
               is not the same as the toolkit option -name.  The default icon
               name is the application name.

               If no suitable icon is found, xterm provides a compiled-in
               pixmap.

               X Toolkit sets the WM_ICON_NAME property using this value.

       -r      This option indicates that reverse video should be simulated by
               swapping the foreground and background colors.  It is equivalent
               to -rv.

       -w number
               This option specifies the width in pixels of the border
               surrounding the window.  It is equivalent to -borderwidth or -bw.

   X Toolkit Options
       The following standard X Toolkit command line arguments are commonly used
       with xterm:

       -bd color
               This option specifies the color to use for the border of the
               window.  The corresponding resource name is borderColor.  Xterm
               uses the X Toolkit default, which is “XtDefaultForeground”.

               Xterm's VT100 window has two borders: the inner border
               internalBorder and the outer border borderWidth, managed by the X
               Toolkit.

               Normally xterm fills the inner border using the VT100 window's
               background color.  If the colorInnerBorder resource is enabled,
               then xterm may fill the inner border using the borderColor
               resource.

       -bg color
               This option specifies the color to use for the background of the
               window.  The corresponding resource name is background.  The
               default is “XtDefaultBackground”.

       -bw number
               This option specifies the width in pixels of the border
               surrounding the window.

               This appears to be a legacy of older X releases.  It sets the
               borderWidth resource of the shell widget, and may provide advice
               to your window manager to set the thickness of the window frame.
               Most window managers do not use this information.  See the -b
               option, which controls the inner border of the xterm window.

       -display display
               This option specifies the X server to contact; see X(1).

       -fg color
               This option specifies the color to use for displaying text.  The
               corresponding resource name is foreground.  The default is
               “XtDefaultForeground”.

       -fn font
               This option specifies the font to be used for displaying normal
               text.  The corresponding resource name is font.  The resource
               value default is fixed.

       -font font
               This is the same as -fn.

       -geometry geometry
               This option specifies the preferred size and position of the
               VTxxx window; see X(1).

               The normal geometry specification can be suffixed with @ followed
               by a Xinerama screen specification; it can be either g for the
               global screen (default), c for the current screen or a screen
               number.

       -iconic
               This option indicates that xterm should ask the window manager to
               start it as an icon rather than as the normal window.  The
               corresponding resource name is iconic.

       -name name
               This option specifies the application name under which resources
               are to be obtained, rather than the default executable file name.
               Name should not contain “.” or “*” characters.

       -rv     This option indicates that reverse video should be simulated by
               swapping the foreground and background colors.  The corresponding
               resource name is reverseVideo.

       +rv     Disable the simulation of reverse video by swapping foreground
               and background colors.

       -title string
               This option specifies the window title string, which may be
               displayed by window managers if the user so chooses.  It is
               shorthand for specifying the “title” resource.  The default title
               is the command line specified after the -e option, if any,
               otherwise the application name.

               X Toolkit sets the WM_NAME property using this value.

       -xrm resourcestring
               This option specifies a resource string to be used.  This is
               especially useful for setting resources that do not have separate
               command line options.

       X Toolkit accepts alternate names for a few of these options, e.g.,

       •   “-background” for “-bg”

       •   “-font” for “-fn”

       •   “-foreground” for “-fg”

       Abbreviated options also are supported, e.g., “-v” for “-verbose.”

RESOURCES
       Xterm understands all of the core X Toolkit resource names and classes.
       Application specific resources (e.g., “XTerm.NAME”) follow:

   Application Resources
       backarrowKeyIsErase (class BackarrowKeyIsErase)
               Tie the VTxxx backarrowKey and ptyInitialErase resources together
               by setting the DECBKM state according to whether the initial
               erase character is a backspace (8) or delete (127) character.  A
               “false” value disables this feature.  The default is “False”.

               Here are tables showing how the initial settings for

               •   backarrowKeyIsErase (BKIE),

               •   backarrowKey (BK), and

               •   ptyInitialErase (PIE), along with the

               •   stty erase character (^H for backspace, ^? for delete)

               will affect DECBKM.  First, xterm obtains the initial erase
               character:

               •   xterm's internal value is ^H

               •   xterm asks the operating system for the value which stty
                   shows

               •   the ttyModes resource may override erase

               •   if ptyInitialErase is false, xterm will look in the terminal
                   database

               Summarizing that as a table:

               PIE     stty   termcap   erase
               ───────────────────────────────
               false    ^H      ^H       ^H
               false    ^H      ^?       ^?
               false    ^?      ^H       ^H
               false    ^?      ^?       ^?
               true     ^H      ^H       ^H
               true     ^H      ^?       ^H
               true     ^?      ^H       ^?
               true     ^?      ^?       ^?

               Using that erase character, xterm allows further choices:

               •   if backarrowKeyIsErase is true, xterm uses the erase
                   character for the initial state of DECBKM

               •   if backarrowKeyIsErase is false, xterm sets DECBKM to 2
                   (internal).  This ties together backarrowKey and the control
                   sequence for DECBKM.

               •   applications can send a control sequence to set/reset DECBKM
                   control set

               •   the “Backarrow Key (BS/DEL)” menu entry toggles DECBKM

               Summarizing the initialization details:

               erase   BKIE    BK      DECBKM   result
               ────────────────────────────────────────
                ^?     false   false     2        ^H
                ^?     false   true      2        ^?
                ^?     true    false     0        ^?
                ^?     true    true      1        ^?
                ^H     false   false     2        ^H
                ^H     false   true      2        ^?
                ^H     true    false     0        ^H
                ^H     true    true      1        ^H

       buffered (class Buffered)
               Normally xterm is built with double-buffer support.  This
               resource can be used to turn it on or off.  Setting the resource
               to “true” turns double-buffering on.  The default value is
               “False”.

       bufferedFPS (class BufferedFPS)
               When xterm is built with double-buffer support, this gives the
               maximum number of frames/second.  The default is “40” and is
               limited to the range 1 through 100.

       fullscreen (class Fullscreen)
               Specifies whether or not xterm should ask the window manager to
               use a fullscreen layout on startup.  Xterm accepts either a
               keyword (ignoring case) or the number shown in parentheses:

               false (0)
                  Fullscreen layout is not used initially, but may be later via
                  menu-selection or control sequence.

               true (1)
                  Fullscreen layout is used initially, but may be disabled later
                  via menu-selection or control sequence.

               always (2)
                  Fullscreen layout is used initially, and cannot be disabled
                  later via menu-selection or control sequence.

               never (3)
                  Fullscreen layout is not used, and cannot be enabled later via
                  menu-selection or control sequence.

               The default is “false”.

       hold (class Hold)
               If true, xterm will not immediately destroy its window when the
               shell command completes.  It will wait until you use the window
               manager to destroy/kill the window, or if you use the menu
               entries that send a signal, e.g., HUP or KILL.  You may scroll
               back, select text, etc., to perform most graphical operations.
               Resizing the display will lose data, however, since this involves
               interaction with the shell which is no longer running.

       hpFunctionKeys (class HpFunctionKeys)
               Specifies whether or not HP function key escape codes should be
               generated for function keys.  The default is “false”, i.e., this
               feature is disabled.

               The keyboardType resource is the preferred mechanism for
               selecting this mode.

       iconGeometry (class IconGeometry)
               Specifies the preferred size and position of the application when
               iconified.  It is not necessarily obeyed by all window managers.

       iconHint (class IconHint)
               Specifies an icon which will be added to the window manager
               hints.  Xterm provides no default value.

               Set this resource to “none” to omit the hint entirely, using
               whatever the window manager may decide.

               If the iconHint resource is given (or is set via the -n option)
               xterm searches for a pixmap file with that name, in the current
               directory as well as in /usr/share/pixmaps.  if the resource does
               not specify an absolute pathname.  In each case, xterm adds
               “_48x48” and/or “.xpm” to the filename after trying without those
               suffixes.  If it is able to load the file, xterm sets the window
               manager hint for the icon-pixmap.  These pixmaps are distributed
               with xterm, and can optionally be compiled-in:

               •   mini.xterm_16x16, mini.xterm_32x32, mini.xterm_48x48

               •   filled-xterm_16x16, filled-xterm_32x32, filled-xterm_48x48

               •   xterm_16x16, xterm_32x32, xterm_48x48

               •   xterm-color_16x16, xterm-color_32x32, xterm-color_48x48

               In either case, xterm allows for adding a “_48x48” to specify the
               largest of the pixmaps as a default.  That is, “mini.xterm” is
               the same as “mini.xterm_48x48”.

               If no explicit iconHint resource is given (or if none of the
               compiled-in names matches), xterm uses “mini.xterm” (which is
               always compiled-in).

               The iconHint resource has no effect on “desktop” files, including
               “panel” and “menu”.  Those are typically set via a “.desktop”
               file; xterm provides samples for itself (and the uxterm script).
               The more capable desktop systems allow changing the icon on a
               per-user basis.

       iconName (class IconName)
               Specifies a label for xterm when iconified.  Xterm provides no
               default value; some window managers may assume the application
               name, e.g., “xterm”.

               Setting the iconName resource sets the icon label unless
               overridden by zIconBeep or the control sequences which change the
               window and icon labels.

       keyboardType (class KeyboardType)
               Enables one (or none) of the various keyboard-type resources:
               hpFunctionKeys, scoFunctionKeys, sunFunctionKeys,
               tcapFunctionKeys, oldXtermFKeys and sunKeyboard.

               The resource's value should be one of the corresponding strings
               “hp”, “sco”, “sun”, “tcap”, “legacy” or “vt220”, respectively.

               The individual resources are provided for legacy support; this
               resource is simpler to use.  Xterm will use only one keyboard-
               type, but if multiple resources are set, it warns and uses the
               last one it checks.

               The default is “unknown”, i.e., none of the associated resources
               are set via this resource.

       maxBufSize (class MaxBufSize)
               Specify the maximum size of the input buffer.  The default is
               “32768”.  You cannot set this to a value less than the minBufSize
               resource.  It will be increased as needed to make that value
               evenly divide this one.

               On some systems you may want to increase one or both of the
               maxBufSize and minBufSize resource values to achieve better
               performance if the operating system prefers larger buffer sizes.

       maximized (class Maximized)
               Specifies whether or not xterm should ask the window manager to
               maximize its layout on startup.  The default is “false”.

       menuHeight (class MenuHeight)
               Specifies the height of the toolbar, which may be increased by
               the X toolkit layout widget depending upon the fontsize used.
               The default is “25”.

       menuLocale (class MenuLocale)
               Specify the locale used for character-set computations when
               loading the popup menus.  Use this to improve initialization
               performance of the Athena popup menus, which may load unnecessary
               (and very large) fonts, e.g., in a locale having UTF-8 encoding.
               The default is “C” (POSIX).

               To use the current locale (only useful if you have localized the
               resource settings for the menu entries), set the resource to an
               empty string.

       messages (class Messages)
               Specifies whether write access to the terminal is allowed
               initially.  See mesg(1).  The default is “true”.

       minBufSize (class MinBufSize)
               Specify the minimum size of the input buffer, i.e., the amount of
               data that xterm requests on each read.  The default is “4096”.
               You cannot set this to a value less than 64.

       omitTranslation (class OmitTranslation)
               Selectively omit one or more parts of xterm's default
               translations at startup.  The resource value is a comma-separated
               list of keywords, which may be abbreviated:

               default
                      ignore (mouse) button-down events which were not handled
                      by other translations

               fullscreen
                      assigns a key-binding to the fullscreen() action.

               keypress
                      assigns keypresses by default to the insert-seven-bit()
                      and insert-eight-bit() actions.

               paging assigns key bindings to the scroll-back() and
                      scroll-forw() actions.

               pointer
                      assigns pointer motion and button events to the
                      pointer-motion() and pointer-button() actions
                      respectively.

               popup-menu
                      assigns mouse-buttons with the control modifier to the
                      popup-menus.

               reset  assigns mouse-button 2 with the meta modifier to the
                      clear-saved-lines action.

               scroll-lock
                      assigns a key-binding to the scroll-lock() action.

               select assigns mouse- and keypress-combinations to actions which
                      manipulate the selection.

                      Xterm also uses these actions to capture mouse button and
                      motion events which can be manipulated with the mouse
                      protocol control sequences.  If the select translations
                      are omitted, then the pointer-motion and pointer-button
                      handle these mouse protocol control sequences instead.

               shift-fonts
                      assigns key-bindings to larger-vt-font() and
                      smaller-vt-font() actions.

               wheel-mouse
                      assigns buttons 4 and 5 with different modifiers to the
                      scroll-back() and scroll-forw() actions.

       ptyHandshake (class PtyHandshake)
               If “true”, xterm will perform handshaking during initialization
               to ensure that the parent and child processes update the utmp and
               stty state.

               See also waitForMap which waits for the pseudo-terminal's notion
               of the screen size, and ptySttySize which resets the screen size
               after other terminal initialization is complete.  The default is
               “true”.

       ptyInitialErase (class PtyInitialErase)
               If “true”, xterm will use the pseudo-terminal's sense of the stty
               erase value.  If “false”, xterm will set the stty erase value to
               match its own configuration, using the kb string from the termcap
               entry as a reference, if available.

               In either case, the result is applied to the TERMCAP variable
               which xterm sets, if the system uses TERMCAP.

               See also the ttyModes resource, which may override this.  The
               default is “False”.

       ptySttySize (class PtySttySize)
               If “true”, xterm will reset the screen size after terminal
               initialization is complete.  This is needed for some systems
               whose pseudo-terminals cannot propagate terminal characteristics.
               Where it is not needed, it can interfere with other methods for
               setting the initial screen size, e.g., via window manager
               interaction.

               See also waitForMap which waits for a handshake-message giving
               the pseudo-terminal's notion of the screen size.  The default is
               “false” on Linux and macOS systems, “true” otherwise.

       reportColors (class ReportColors)
               If true, xterm will print to the standard output a summary of
               colors as it allocates them.  The default is “false”.

       reportFonts (class ReportFonts)
               If true, xterm will print to the standard output a summary of
               each font's metrics (size, number of glyphs, etc.), as it loads
               them.  The default is “false”.

       reportIcons (class ReportIcons)
               If true, xterm will print to the standard output a summary of
               each pixmap icon as it loads them.  The default is “false”.

       reportXRes (class ReportXRes)
               If true, xterm will print to the standard output a list of the
               boolean, numeric and string X resources for the VT100 widget
               after initialization.  The default is “false”.

       sameName (class SameName)
               If the value of this resource is “true”, xterm does not send
               title and icon name change requests when the request would have
               no effect: the name is not changed.  This has the advantage of
               preventing flicker and the disadvantage of requiring an extra
               round trip to the server to find out the previous value.  In
               practice this should never be a problem.  The default is “true”.

       scaleHeight (class ScaleHeight)
               Scale line-height values by the resource value, which is limited
               to “0.9” to “1.5”.  The default value is “1.0”,

               While this resource applies to either bitmap or TrueType fonts,
               its main purpose is to help work around incompatible changes in
               the Xft library's font metrics.  Xterm checks the font metrics to
               find what the library claims are the bounding boxes for each
               glyph (character).  However, some of Xft's features (such as the
               autohinter) can cause the glyphs to be scaled larger than the
               bounding boxes, and be partly overwritten by the next row.

               See useClipping for a related resource.

       scoFunctionKeys (class ScoFunctionKeys)
               Specifies whether or not SCO function key escape codes should be
               generated for function keys.  The default is “false”, i.e., this
               feature is disabled.

               The keyboardType resource is the preferred mechanism for
               selecting this mode.

       sessionMgt (class SessionMgt)
               If the value of this resource is “true”, xterm sets up session
               manager callbacks for XtNdieCallback and XtNsaveCallback.  The
               default is “true”.

       sunFunctionKeys (class SunFunctionKeys)
               Specifies whether or not Sun function key escape codes should be
               generated for function keys.  The default is “false”, i.e., this
               feature is disabled.

               The keyboardType resource is the preferred mechanism for
               selecting this mode.

       sunKeyboard (class SunKeyboard)
               Xterm translates certain key symbols based on its assumptions
               about your keyboard.  This resource specifies whether or not
               Sun/PC keyboard layout (i.e., the PC keyboard's numeric keypad
               together with 12 function keys) should be assumed rather than DEC
               VT220.  This causes the keypad “+” to be mapped to “,”.  and CTRL
               F1-F10 to F11-F20, depending on the setting of the ctrlFKeys
               resource, so xterm emulates a DEC VT220 more accurately.
               Otherwise (the default, with sunKeyboard set to “false”), xterm
               uses PC-style bindings for the function keys and keypad.

               PC-style bindings use the Shift, Alt, Control and Meta keys as
               modifiers for function-keys and keypad (see Xterm Control
               Sequences for details).  The PC-style bindings are analogous to
               PCTerm, but not the same thing.  Normally these bindings do not
               conflict with the use of the Meta key as described for the
               eightBitInput resource.  If they do, note that the PC-style
               bindings are evaluated first.

               See also the keyboardType resource.

       tcapFunctionKeys (class TcapFunctionKeys)
               Specifies whether or not function key escape codes read from the
               termcap/terminfo entry corresponding to the TERM environment
               variable should be generated for function keys instead of those
               configured using sunKeyboard and keyboardType.  The default is
               “false”, i.e., this feature is disabled.

               The keyboardType resource is the preferred mechanism for
               selecting this mode.

       termName (class TermName)
               Specifies the terminal type name to be set in the TERM
               environment variable.

       title (class Title)
               Specifies a string that may be used by the window manager when
               displaying this application.

       toolBar (class ToolBar)
               Specifies whether or not the toolbar should be displayed.  The
               default is “true”.

       ttyModes (class TtyModes)
               Specifies a string containing terminal setting keywords.  Except
               where noted, they may be bound to characters.  Other keywords set
               modes.  Not all keywords are supported on a given system.
               Allowable keywords include:

               Keyword   POSIX?   Notes
               ────────────────────────────────────────────────────────────────
               brk       no       CHAR may send an “interrupt” signal, as well
                                  as ending the input-line.
               dsusp     no       CHAR will send a terminal “stop” signal
                                  after input is flushed.
               eof       yes      CHAR will terminate input (i.e., an end of
                                  file).
               eol       yes      CHAR will end the line.
               eol2      no       alternate CHAR for ending the line.
               erase     yes      CHAR will erase the last character typed.
               erase2    no       alternate CHAR for erasing the last input-
                                  character.
               flush     no       CHAR will cause output to be discarded until
                                  another flush character is typed.
               intr      yes      CHAR will send an “interrupt” signal.
               kill      yes      CHAR will erase the current line.
               lnext     no       CHAR will enter the next character quoted.
               quit      yes      CHAR will send a “quit” signal.
               rprnt     no       CHAR will redraw the current line.
               start     yes      CHAR will restart the output after stopping
                                  it.
               status    no       CHAR will cause a system-generated status
                                  line to be printed.

               stop      yes      CHAR will stop the output.
               susp      yes      CHAR will send a terminal “stop” signal
               swtch     no       CHAR will switch to a different shell layer.
               tabs      yes      Mode disables tab-expansion.
               -tabs     yes      Mode enables tab-expansion.
               weras     no       CHAR will erase the last word typed.

               Control characters may be specified as ^char (e.g., ^c or ^u) and
               ^? may be used to indicate delete (127).  Use ^- to denote undef.
               Use \034 to represent ^\, since a literal backslash in an X
               resource escapes the next character.

               This is very useful for overriding the default terminal settings
               without having to run stty every time an xterm is started.  Note,
               however, that the stty program on a given host may use different
               keywords; xterm's table is built in.  The POSIX column in the
               table indicates which keywords are supported by a standard stty
               program.

               If the ttyModes resource specifies a value for erase, that
               overrides the ptyInitialErase resource setting, i.e., xterm
               initializes the terminal to match that value.

       useInsertMode (class UseInsertMode)
               Force use of insert mode by adding appropriate entries to the
               TERMCAP environment variable.  This is useful if the system
               termcap is broken.  (This resource is ignored on most systems,
               because TERMCAP is not used).  The default is “false”.

       utmpDisplayId (class UtmpDisplayId)
               Specifies whether or not xterm should try to record the display
               identifier (display number and screen number) as well as the
               hostname in the system utmp log file.  The default is “true”.

       utmpInhibit (class UtmpInhibit)
               Specifies whether or not xterm should try to record the user's
               terminal in the system utmp log file.  If true, xterm will not
               try.  The default is “false”.

       validShells (class ValidShells)
               Augment (add to) the system's /etc/shells, when determining
               whether to set the “SHELL” environment variable when running a
               given program.

               The resource value is a list of lines (separated by newlines).
               Each line holds one pathname.  Xterm ignores any line beginning
               with “#” after trimming leading/trailing whitespace from each
               line.

               The default is an empty string.

       waitForMap (class WaitForMap)
               Specifies whether or not xterm should wait for the initial window
               map before starting the subprocess.  This is part of the
               ptyHandshake logic.  When xterm is directed to wait in this
               fashion, it passes the terminal size from the display end of the
               pseudo-terminal to the terminal I/O connection, e.g., using the
               size according to the window manager.  Otherwise, it uses the
               size as given in resource values or command-line option
               -geometry.  The default is “false”.

       zIconBeep (class ZIconBeep)
               Same as -ziconbeep command line argument.  If the value of this
               resource is non-zero, xterms that produce output while iconified
               will cause an XBell sound at the given volume and have “*** ”
               prepended to their icon titles.  Most window managers will detect
               this change immediately, showing you which window has the output.
               (A similar feature was in x10 xterm.)  The default is “false”.

       zIconTitleFormat (class ZIconTitleFormat)
               Allow customization of the string used in the zIconBeep feature.
               The default value is “*** %s”.

               If the resource value contains a “%s”, then xterm inserts the
               icon title at that point rather than prepending the string to the
               icon title.  (Only the first “%s” is used).

   VT100 Widget Resources
       The following resources are specified as part of the vt100 widget (class
       VT100).  They are specified by patterns such as “XTerm.vt100.NAME”.

       If your xterm is configured to support the “toolbar”, then those patterns
       need an extra level for the form-widget which holds the toolbar and vt100
       widget.  A wildcard between the top-level “XTerm” and the “vt100” widget
       makes the resource settings work for either, e.g., “XTerm*vt100.NAME”.

       activeIcon (class ActiveIcon)
               Specifies whether or not active icon windows are to be used when
               the xterm window is iconified, if this feature is compiled into
               xterm.  The active icon is a miniature representation of the
               content of the window and will update as the content changes.
               Not all window managers necessarily support application icon
               windows.  Some window managers will allow you to enter keystrokes
               into the active icon window.  The default is “default”.

               Xterm accepts either a keyword (ignoring case) or the number
               shown in parentheses:

               false (0)
                      No active icon is shown.

               true (1)
                      The active icon is shown.  If you are using twm, use this
                      setting to enable active-icons.

               default (2)
                      Xterm checks at startup, and shows an active icon only for
                      window managers which it can identify and which are known
                      to support the feature.  These are fvwm (full support),
                      and window maker (limited).  A few other windows managers
                      (such as twm and ctwm) support active icons, but do not
                      support the extensions which allow xterm to identify the
                      window manager.

       allowBoldFonts (class AllowBoldFonts)
               When set to “false”, xterm will not use bold fonts.  This
               overrides both the alwaysBoldMode and the boldMode resources.

       allowC1Printable (class AllowC1Printable)
               If true, overrides the mapping of C1 controls (codes 128–159) to
               make them be treated as if they were printable characters.
               Although this corresponds to no particular standard, some users
               insist it is a VT100.  The default is “false”.

       allowColorOps (class AllowColorOps)
               Specifies whether control sequences that set/query the dynamic
               colors should be allowed.  ANSI colors are unaffected by this
               resource setting.  The default is “true”.

       allowFontOps (class AllowFontOps)
               Specifies whether control sequences that set/query the font
               should be allowed.  The default is “true”.

       allowMouseOps (class AllowMouseOps)
               Specifies whether control sequences that enable xterm to send
               escape sequences to the host on mouse-clicks and movement.  The
               default is “true”.

       allowPasteControls (class AllowPasteControls)
               If true, allow control characters such as BEL and CAN to be
               pasted.  Formatting characters (tab, newline) are always allowed.
               Other C0 control characters are suppressed unless this resource
               is enabled.  The exact set of control characters (C0 and C1)
               depends upon whether UTF-8 encoding is used, as well as the
               allowC1Printable resource.  The default is “false”.

       allowScrollLock (class AllowScrollLock)
               Specifies whether control sequences that set/query the Scroll
               Lock key should be allowed, as well as whether the Scroll Lock
               key responds to user's keypress.  The default is “false”.

               When this feature is enabled, xterm will sense the state of the
               Scroll Lock key each time it acquires focus.  Pressing the Scroll
               Lock key toggles xterm's internal state, as well as toggling the
               associated LED.  While the Scroll Lock is active, xterm attempts
               to keep a viewport on the same set of lines.  If the current
               viewport is scrolled past the limit set by the saveLines
               resource, then Scroll Lock has no further effect.

               The reason for setting the default to “false” is to avoid user
               surprise.  This key is generally unused in keyboard
               configurations, and has not acquired a standard meaning even when
               it is used in that manner.  Consequently, users have assigned it
               for ad hoc purposes.

       allowSendEvents (class AllowSendEvents)
               Specifies whether or not synthetic key and button events
               (generated using the X protocol SendEvent request) should be
               interpreted or discarded.  The default is “false” meaning they
               are discarded.  Note that allowing such events would create a
               very large security hole, therefore enabling this resource
               forcefully disables the allowXXXOps resources.  The default is
               “false”.

       allowTcapOps (class AllowTcapOps)
               Specifies whether control sequences that query the terminal's
               notion of its function-key strings, as termcap or terminfo
               capabilities should be allowed.  The default is “true”.

               A few programs, e.g., vim, use this feature to get an accurate
               description of the terminal's capabilities, independent of the
               termcap/terminfo setting:

               •   Xterm can tell the querying program how many colors it
                   supports.  This is a constant, depending on how it is
                   compiled, typically 16.  It does not change if you alter
                   resource settings, e.g., the boldColors resource.

               •   Xterm can tell the querying program what strings are sent by
                   modified (shift-, control-, alt-) function- and keypad-keys.
                   Reporting control- and alt-modifiers is a feature that relies
                   on the ncurses extended naming.

       allowTitleOps (class AllowTitleOps)
               Specifies whether control sequences that modify the window title
               or icon name should be allowed.  The default is “true”.

       allowWindowOps (class AllowWindowOps)
               Specifies whether extended window control sequences (as used in
               dtterm) should be allowed.  These include several control
               sequences which manipulate the window size or position, as well
               as reporting these values and the title or icon name.  Each of
               these can be abused in a script; curiously enough most terminal
               emulators that implement these restrict only a small part of the
               repertoire.  For fine-tuning, see disallowedWindowOps.  The
               default is “false”.

       altIsNotMeta (class AltIsNotMeta)
               If “true”, treat the Alt-key as if it were the Meta-key.  Your
               keyboard may happen to be configured so they are the same.  But
               if they are not, this allows you to use the same prefix- and
               shifting operations with the Alt-key as with the Meta-key.  See
               altSendsEscape and metaSendsEscape.  The default is “false”.

       altSendsEscape (class AltSendsEscape)
               This is an additional keyboard operation that may be processed
               after the logic for metaSendsEscape.  It is only available if the
               altIsNotMeta resource is set.

               •   If “true”, Alt characters (a character combined with the
                   modifier associated with left/right Alt-keys) are converted
                   into a two-character sequence with the character itself
                   preceded by ESC.  This applies as well to function key
                   control sequences, unless xterm sees that Alt is used in your
                   key translations.

               •   If “false”, Alt characters input from the keyboard cause a
                   shift to 8-bit characters (just like metaSendsEscape).  By
                   combining the Alt- and Meta-modifiers, you can create
                   corresponding combinations of ESC-prefix and 8-bit
                   characters.

               The default is “False”.  Xterm provides a menu option for
               toggling this resource.

       alternateScroll (class ScrollCond)
               If “true”, the scroll-back and scroll-forw actions send cursor-up
               and -down keys when xterm is displaying the alternate screen.
               The default is “false”.

               The alternateScroll state can also be set using a control
               sequence.

       alwaysBoldMode (class AlwaysBoldMode)
               Specifies whether xterm should check if the normal and bold fonts
               are distinct before deciding whether to use overstriking to
               simulate bold fonts.  If this resource is true, xterm does not
               make the check for distinct fonts when deciding how to handle the
               boldMode resource.  The default is “false”.

               boldMode   alwaysBoldMode   Comparison   Action
               ────────────────────────────────────────────────────
               false      false            ignored      use font
               false      true             ignored      use font
               true       false            same         overstrike
               true       false            different    use font
               true       true             ignored      overstrike

               This resource is used only for bitmap fonts:

               •   When using bitmap fonts, it is possible that the font server
                   will approximate the bold font by rescaling it from a
                   different font size than expected.  The alwaysBoldMode
                   resource allows the user to override the (sometimes poor)
                   resulting bold font with overstriking (which is at least
                   consistent).

               •   The problem does not occur with TrueType fonts (though there
                   can be other unnecessary issues such as different coverage of
                   the normal and bold fonts).

               As an alternative, setting the allowBoldFonts resource to false
               overrides both the alwaysBoldMode and the boldMode resources.

       alwaysHighlight (class AlwaysHighlight)
               Specifies whether or not xterm should always display a
               highlighted text cursor.  By default (if this resource is false),
               a hollow text cursor is displayed whenever the pointer moves out
               of the window or the window loses the input focus.  The default
               is “false”.

       alwaysUseMods (class AlwaysUseMods)
               Override the numLock resource, telling xterm to use the Alt and
               Meta modifiers to construct parameters for function key sequences
               even if those modifiers appear in the translations resource.
               Normally xterm checks if Alt or Meta is used in a translation
               that would conflict with function key modifiers, and will ignore
               these modifiers in that special case.  The default is “false”.

       answerbackString (class AnswerbackString)
               Specifies the string that xterm sends in response to an ENQ
               (control/E) character from the host.  The default is a blank
               string, i.e., “”.  A hardware VT100 implements this feature as a
               setup option.

       appcursorDefault (class AppcursorDefault)
               If “true”, the cursor keys are initially in application mode.
               This is the same as the VT102 private DECCKM mode, The default is
               “false”.

       appkeypadDefault (class AppkeypadDefault)
               If “true”, the keypad keys are initially in application mode.
               The default is “false”.

       assumeAllChars (class AssumeAllChars)
               If “true”, this enables a special case in bitmap fonts to allow
               the font server to choose how to display missing glyphs.  The
               default is “true”.

               The reason for this resource is to help with certain quasi-
               automatically generated fonts (such as the ISO-10646-1 encoding
               of Terminus) which have incorrect font-metrics.

       autoWrap (class AutoWrap)
               Specifies whether or not auto-wraparound should be enabled.  This
               is the same as the VT102 DECAWM.  The default is “true”.

       awaitInput (class AwaitInput)
               Specifies whether or not xterm uses a 50 millisecond timeout to
               await input (i.e., to support the Xaw3d arrow scrollbar).  The
               default is “false”.

       backarrowKey (class BackarrowKey)
               Specifies whether the backarrow key transmits a backspace (8) or
               delete (127) character.  This corresponds to the DECBKM control
               sequence.  A “true” value specifies backspace.  The default is
               “True”.  Pressing the control key toggles this behavior.

       background (class Background)
               Specifies the color to use for the background of the window.  The
               default is “XtDefaultBackground”.

       bellIsUrgent (class BellIsUrgent)
               Specifies whether to set the Urgency hint for the window manager
               when making a bell sound.  The default is “false”.

       bellOnReset (class BellOnReset)
               Specifies whether to sound a bell when doing a hard reset.  The
               default is “true”.

       bellSuppressTime (class BellSuppressTime)
               Number of milliseconds after a bell command is sent during which
               additional bells will be suppressed.  Default is 200.  If set
               non-zero, additional bells will also be suppressed until the
               server reports that processing of the first bell has been
               completed; this feature is most useful with the visible bell.

       boldColors (class ColorMode)
               Specifies whether to combine bold attribute with colors like the
               IBM PC, i.e., map colors 0 through 7 to colors 8 through 15.
               These normally are the brighter versions of the first 8 colors,
               hence bold.  The default is “true”.

       boldFont (class BoldFont)
               Specifies the name of the bold font to use instead of
               overstriking.  There is no default for this resource.

               This font must be the same height and width as the normal font,
               otherwise it is ignored.  If only one of the normal or bold fonts
               is specified, it will be used as the normal font and the bold
               font will be produced by overstriking this font.

               See also the discussion of boldMode and alwaysBoldMode resources.

       boldMode (class BoldMode)
               This specifies whether or not text with the bold attribute should
               be overstruck to simulate bold fonts if the resolved bold font is
               the same as the normal font.  It may be desirable to disable bold
               fonts when color is being used for the bold attribute.

               Note that xterm has one bold font which you may set explicitly.
               Xterm attempts to derive a bold font for the other font
               selections (font1 through font7).  If it cannot find a bold font,
               it will use the normal font.  In each case (whether the explicit
               resource or the derived font), if the normal and bold fonts are
               distinct, this resource has no effect.  The default is “true”.

               See the alwaysBoldMode resource which can modify the behavior of
               this resource.

               Although xterm attempts to derive a bold font for other font
               selections, the font server may not cooperate.  Since X11R6,
               bitmap fonts have been scaled.  The font server claims to provide
               the bold font that xterm requests, but the result is not always
               readable.  XFree86 introduced a feature which can be used to
               suppress the scaling.  In the X server's configuration file
               (e.g., “/etc/X11/XFree86” or “/etc/X11/xorg.conf”), you can add
               “:unscaled” to the end of the directory specification for the
               “misc” fonts, which comprise the fixed-pitch fonts that are used
               by xterm.  For example

                   FontPath                 "/usr/lib/X11/fonts/misc/"

               would become

                   FontPath                 "/usr/lib/X11/fonts/misc/:unscaled"

               Depending on your configuration, the font server may have its own
               configuration file.  The same “:unscaled” can be added to its
               configuration file at the end of the directory specification for
               “misc”.

               The bitmap scaling feature is also used by xterm to implement
               VT102 double-width and double-height characters.

       brokenLinuxOSC (class BrokenLinuxOSC)
               If true, xterm applies a workaround to ignore malformed control
               sequences that a Linux script might send.  Compare the palette
               control sequences documented in console_codes with ECMA-48.  The
               default is “true”.

       brokenSelections (class BrokenSelections)
               If true, xterm in 8-bit mode will interpret STRING selections as
               carrying text in the current locale's encoding.  Normally STRING
               selections carry ISO-8859-1 encoded text.  Setting this resource
               to “true” violates the ICCCM; it may, however, be useful for
               interacting with some broken X clients.  The default is “false”.

       brokenStringTerm (class BrokenStringTerm)
               provides a work-around for some ISDN routers which start an
               application control string without completing it.  Set this to
               “true” if xterm appears to freeze when connecting.  The default
               is “false”.

               Xterm's state parser recognizes several types of control strings
               which can contain text, e.g.,

               APC (Application Program Command),
               DCS (Device Control String),
               OSC (Operating System Command),
               PM (Privacy Message), and
               SOS (Start of String),

               Each should end with a string-terminator (a special character
               which cannot appear in these strings).  Ordinary control
               characters found within the string are not ignored; they are
               processed without interfering with the process of accumulating
               the control string's content.  Xterm recognizes these controls in
               all modes, although some of the functions may be suppressed after
               parsing the control.

               When enabled, this feature allows the user to exit from an
               unterminated control string when any of these ordinary control
               characters are found:

               control/D (used as an end of file in many shells),
               control/H (backspace),
               control/I (tab-feed),
               control/J (line feed aka newline),
               control/K (vertical tab),
               control/L (form feed),
               control/M (carriage return),
               control/N (shift-out),
               control/O (shift-in),
               control/Q (XOFF),
               control/X (cancel)

       c132 (class C132)
               Specifies whether or not the VT102 DECCOLM escape sequence, used
               to switch between 80 and 132 columns, should be honored.  The
               default is “false”.

       cacheDoublesize (class CacheDoublesize)
               Tells whether to cache double-sized fonts by xterm.  Set this to
               zero to disable double-sized fonts altogether.

       cdXtraScroll (class CdXtraScroll)
               Specifies whether xterm should scroll to a new page when clearing
               the whole screen.  Like tiXtraScroll, the intent of this option
               is to provide a picture of the full-screen application's display
               on the scrollback before wiping out the text.  The default for
               this resource is “false”.

       charClass (class CharClass)
               Specifies comma-separated lists of character class bindings of
               the form

                   low[-high][:value].

               These are used in determining which sets of characters should be
               treated the same when doing cut and paste.  See the CHARACTER
               CLASSES section.

       checksumExtension (class ChecksumExtension)
               DEC VT420 and up support a control sequence DECRQCRA which
               reports the checksum of the characters in a rectangle.  Xterm
               supports this, with extensions that can be configured with bits
               of the checksumExtension:

               0    do not negate the result.

               1    do not report the VT100 video attributes.

               2    do not omit checksum for blanks.

               3    omit checksum for cells not explicitly initialized.

               4    do not mask cell value to 8 bits or ignore combining
                    characters.

               5    do not mask cell value to 7 bits.

               With the default value (0), xterm matches the behavior of DEC's
               terminals.  To use all extensions, set all bits, “-1” for
               example.

       cjkWidth (class CjkWidth)
               Specifies whether xterm should follow the traditional East Asian
               width convention.  When turned on, characters with East Asian
               Ambiguous (A) category in UTR 11 have a column width of 2.  You
               may have to set this option to “true” if you have some old East
               Asian terminal based programs that assume that line-drawing
               characters have a column width of 2.  If this resource is false,
               the mkWidth resource controls the choice between the system's
               wcwidth and xterm's built-in tables.  The default is “false”.

       color0 (class Color0)

       color1 (class Color1)

       color2 (class Color2)

       color3 (class Color3)

       color4 (class Color4)

       color5 (class Color5)

       color6 (class Color6)

       color7 (class Color7)
               These specify the colors for the ISO-6429 extension.  The
               defaults are, respectively, black, red3, green3, yellow3, a
               customizable dark blue, magenta3, cyan3, and gray90.  The default
               shades of color are chosen to allow the colors 8–15 to be used as
               brighter versions.

       color8 (class Color8)

       color9 (class Color9)

       color10 (class Color10)

       color11 (class Color11)

       color12 (class Color12)

       color13 (class Color13)

       color14 (class Color14)

       color15 (class Color15)
               These specify the colors for the ISO-6429 extension if the bold
               attribute is also enabled.  The default resource values are
               respectively, gray50, red, green, yellow, a customized light
               blue, magenta, cyan, and white.

       color16 (class Color16)

       through

       color255 (class Color255)
               These specify the colors for the 256-color extension.  The
               default resource values are for

               •   colors 16 through 231 to make a 6x6x6 color cube, and

               •   colors 232 through 255 to make a grayscale ramp.

               Resources past color15 are available as a compile-time option.
               Due to a hardcoded limit in the X libraries on the total number
               of resources (to 400), the resources for 256-colors are omitted
               when wide-character support and luit are enabled.  Besides
               inconsistent behavior if only part of the resources were allowed,
               determining the exact cutoff is difficult, and the X libraries
               tend to crash if the number of resources exceeds the limit.  The
               color palette is still initialized to the same default values,
               and can be modified via control sequences.

               On the other hand, the resource limit does permit including the
               entire range for 88-colors.

       colorAttrMode (class ColorAttrMode)
               Specifies whether colorBD, colorBL, colorRV, and colorUL should
               override ANSI colors.  If not, these are displayed only when no
               ANSI colors have been set for the corresponding position.  The
               default is “false”.

       colorBD (class ColorBD)
               This specifies the color to use to display bold characters if the
               “colorBDMode” resource is enabled.  The default is
               “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining bold
               and color.

       colorBDMode (class ColorAttrMode)
               Specifies whether characters with the bold attribute should be
               displayed in color or as bold characters.  Note that setting
               colorMode off disables all colors, including bold.  The default
               is “false”.

       colorBL (class ColorBL)
               This specifies the color to use to display blink characters if
               the “colorBLMode” resource is enabled.  The default is
               “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining
               underline and color.

       colorBLMode (class ColorAttrMode)
               Specifies whether characters with the blink attribute should be
               displayed in color.  Note that setting colorMode off disables all
               colors, including this.  The default is “false”.

       colorIT (class ColorIT)
               This specifies the color to use to display italic characters if
               the “colorITMode” resource is enabled.  The default is
               “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining
               attributes and color.

       colorITMode (class ColorAttrMode)
               Specifies whether characters with the italic attribute should be
               displayed in color or as italic characters.  The default is
               “false”.

               Note that:

               •   Setting colorMode off disables all colors, including italic.

               •   The italicULMode resource overrides colorITMode.

       colorInnerBorder (class ColorInnerBorder)
               Normally, xterm fills the VT100 window's inner border using the
               background color.

               If the colorInnerBorder resource is enabled, at startup xterm
               will compare the borderColor and the window's background color.
               If those are different, xterm will use the borderColor resource
               to fill the inner border.  Otherwise, it will use the window's
               background color.

               The default is “false”.

       colorMode (class ColorMode)
               Specifies whether or not recognition of ANSI (ISO-6429) color
               change escape sequences should be enabled.  The default is
               “true”.

       colorRV (class ColorRV)
               This specifies the color to use to display reverse characters if
               the “colorRVMode” resource is enabled.  The default is
               “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining
               reverse and color.

       colorRVMode (class ColorAttrMode)
               Specifies whether characters with the reverse attribute should be
               displayed in color.  Note that setting colorMode off disables all
               colors, including this.  The default is “false”.

       colorUL (class ColorUL)
               This specifies the color to use to display underlined characters
               if the “colorULMode” resource is enabled.  The default is
               “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining
               underline and color.

       colorULMode (class ColorAttrMode)
               Specifies whether characters with the underline attribute should
               be displayed in color or as underlined characters.  Note that
               setting colorMode off disables all colors, including underlining.
               The default is “false”.

       combiningChars (class CombiningChars)
               Specifies the number of wide-characters which can be stored in a
               cell to overstrike (combine) with the base character of the cell.
               This can be set to values in the range 0 to 5.  The default is
               “2”.

       ctrlFKeys (class CtrlFKeys)
               In VT220 keyboard mode (see sunKeyboard resource), specifies the
               amount by which to shift F1-F12 given a control modifier (CTRL).
               This allows you to generate key symbols for F10-F20 on a Sun/PC
               keyboard.  The default is “10”, which means that CTRL F1
               generates the key symbol for F11.

       curses (class Curses)
               Specifies whether or not the last column bug in more(1) should be
               worked around.  See the -cu option for details.  The default is
               “false”.

       cursorBlink (class CursorBlink)
               Specifies whether to make the cursor blink.  Xterm accepts either
               a keyword (ignoring case) or the number shown in parentheses:

               false (0)
                  The cursor will not blink, but may be combined with escape
                  sequences according to the cursorBlinkXOR resource.

               true (1)
                  The cursor will blink, but may be combined with escape
                  sequences according to the cursorBlinkXOR resource.

               always (2)
                  The cursor will always blink, ignoring escape sequences.  The
                  menu entry will be disabled.

               never (3)
                  The cursor will never blink, ignoring escape sequences.  The
                  menu entry will be disabled.

               The default is “false”.

       cursorBlinkXOR (class CursorBlinkXOR)
               Xterm uses two inputs to determine whether the cursor blinks:

               •   The cursorBlink resource (which can be altered with a menu
                   entry).

               •   Control sequences (private mode 12 and DECSCUSR).

               The cursorBlinkXOR resource determines how those inputs are
               combined:

               false
                    Xterm uses the logical-OR of the two variables.  If either
                    is set, xterm makes the cursor blink.

               true
                    Xterm uses the logical-XOR of the two variables.  If only
                    one is set, xterm makes the cursor blink.

               The default is “true”.

       cursorColor (class CursorColor)
               Specifies the color to use for the text cursor.  The default is
               “XtDefaultForeground”.  By default, xterm attempts to keep this
               color from being the same as the background color, since it draws
               the cursor by filling the background of a text cell.  The same
               restriction applies to control sequences which may change this
               color.

               Setting this resource overrides most of xterm's adjustments to
               cursor color.  It will still use reverse-video to disallow some
               cases, such as a black cursor on a black background.

       cursorOffTime (class CursorOffTime)
               Specifies the duration of the “off” part of the cursor blink
               cycle-time in milliseconds.  The same timer is used for text
               blinking.  The default is “300”.

       cursorOnTime (class CursorOnTime)
               Specifies the duration of the “on” part of the cursor blink
               cycle-time, in milliseconds.  The same timer is used for text
               blinking.  The default is “600”.

       cursorUnderLine (class CursorUnderLine)
               Specifies whether to make the cursor underlined or a box.  The
               default is “false”.

       cutNewline (class CutNewline)
               If “false”, triple clicking to select a line does not include the
               newline at the end of the line.  If “true”, the Newline is
               selected.  The default is “true”.

       cutToBeginningOfLine (class CutToBeginningOfLine)
               If “false”, triple clicking to select a line selects only from
               the current word forward.  If “true”, the entire line is
               selected.  The default is “true”.

       decGraphicsID (class DecGraphicsID)
               Allows a way to combine the graphics feature from certain DEC
               terminals (125, 240, 241, 330, 340 or 382) with other emulation
               levels which did not provide the graphics feature.  As in
               decTerminalID, leading non-digit characters are ignored, e.g.,
               “vt340” and “340” are the same.

               If the resource value is nonzero, xterm uses that emulation level
               when initializing the drawing region and decoding control
               sequences to draw graphics.

               The default is “0”.

       decTerminalID (class DecTerminalID)
               Specifies the emulation level (100=VT100, 220=VT220, etc.), used
               to determine the type of response to a DA control sequence.
               Leading non-digit characters are ignored, e.g., “vt100” and “100”
               are the same.  The default is “420”.

       defaultString (class DefaultString)
               Specify the character (or string) which xterm will substitute
               when pasted text includes a character which cannot be represented
               in the current encoding.  For instance, pasting UTF-8 text into a
               display of ISO-8859-1 characters will only be able to display
               codes 0–255, while UTF-8 text can include Unicode values above
               255.  The default is “#” (a single pound sign).

               If the undisplayable text would be double-width, xterm will add a
               space after the “#” character, to give roughly the same layout on
               the screen as the original text.

       deleteIsDEL (class DeleteIsDEL)
               Specifies what the Delete key on the editing keypad should send
               when pressed.  The resource value is a string, evaluated as a
               boolean after startup.  Xterm uses it in conjunction with the
               keyboardType resource:

               •   If the keyboard type is “default”, or “vt220” and the
                   resource is either “true” or “maybe” send the VT220-style
                   Remove escape sequence.  Otherwise, send DEL (127).

               •   If the keyboard type is “legacy”, and the resource is “true”
                   send DEL.  Otherwise, send the Remove sequence.

               •   Otherwise, if the keyboard type is none of these special
                   cases, send DEL (127).

               The default is “Maybe”.  The resource is allowed to be a non-
               boolean “maybe” so that the popup menu Delete is DEL entry does
               not override the keyboard type.

       directColor (class DirectColor)
               Specifies whether to handle direct-color control sequences using
               the X server's available colors, or to approximate those using a
               color map with 256 entries.  A “true” value enables the former.
               The default is “true”.

       disallowedColorOps (class DisallowedColorOps)
               Specify which features will be disabled if allowColorOps is
               false.  This is a comma-separated list of names.  The default
               value is
               SetColor,GetColor,GetAnsiColor

               The names are listed below.  Xterm ignores capitalization, but
               they are shown in mixed-case for clarity.

               SetColor
                    Set a specific dynamic color.

               GetColor
                    Report the current setting of a given dynamic color.

               GetAnsiColor
                    Report the current setting of a given ANSI color (actually
                    any of the colors set via ANSI-style controls).

       disallowedFontOps (class DisallowedFontOps)
               Specify which features will be disabled if allowFontOps is false.
               This is a comma-separated list of names.  The default value is

                   SetFont,GetFont

               The names are listed below.  Xterm ignores capitalization, but
               they are shown in mixed-case for clarity.

               SetFont
                    Set the specified font.

               GetFont
                    Report the specified font.

       disallowedMouseOps (class DisallowedMouseOps)
               Specify which features will be disabled if allowMouseOps is
               false.  This is a comma-separated list of names.  The default
               value is “*” which matches all names.  The names are listed
               below.  Xterm ignores capitalization, but they are shown in
               mixed-case for clarity.

               X10  The original X10 mouse protocol.

               Locator
                    DEC locator mode

               VT200Click
                    X11 mouse-clicks only.

               VT200Hilite
                    X11 mouse-clicks and highlighting.

               AnyButton
                    XFree86 xterm any-button mode sends button-clicks as well as
                    motion events while the button is pressed.

               AnyEvent
                    XFree86 xterm any-event mode sends button-clicks as well as
                    motion events whether or not a button is pressed.

               FocusEvent
                    Send FocusIn/FocusOut events.

               Extended
                    The first extension beyond X11 mouse protocol, this encodes
                    the coordinates in UTF-8.  It is deprecated in favor of SGR,
                    but provided for compatibility.

               SGR  This is the recommended extension for mouse-coordinates

               URXVT
                    Like Extended, this is provided for compatibility.

               AlternateScroll
                    This overrides the alternateScroll resource.

       disallowedPasteControls (class DisallowedPasteControls)
               The allowPasteControls resource is normally used to prevent
               pasting C1 controls, as well as non-formatting C0 controls such
               as the ASCII escape character.  Those characters are simply
               ignored.  This resource further extends the set of control
               characters which cannot be pasted, converting each into a space.

               The resource value is a comma-separated list of names.  Xterm
               ignores capitalization.  The default value is

                   BS,HT,DEL,ESC

               The names are listed below:

               C0   all ASCII control characters.

               BS   ASCII backspace

               CR   ASCII carriage-return

               DEL  ASCII delete

               ESC  ASCII escape

               FF   ASCII form-feed

               HT   ASCII tab

               NL   ASCII line-feed, i.e., “newline”.

       disallowedTcapOps (class DisallowedTcapOps)
               Specify which features will be disabled if allowTcapOps is false.
               This is a comma-separated list of names.  The default value is

                   SetTcap,GetTcap

               The names are listed below.  Xterm ignores capitalization, but
               they are shown in mixed-case for clarity.

               SetTcap
                    (not implemented)

               GetTcap
                    Report specified function- and other special keys.

       disallowedWindowOps (class DisallowedWindowOps)
               Specify which features will be disabled if allowWindowOps is
               false.  This is a comma-separated list of names, or (for the
               controls adapted from dtterm the operation number).  The default
               value is

                   20,21,SetXprop,SetSelection
                   (i.e., all except a few “dangerous” operations are allowed).

               The names are listed below.  Xterm ignores capitalization, but
               they are shown in mixed-case for clarity.  Where a number can be
               used as an alternative, it is given in parentheses after the
               name.

               GetChecksum
                    Report checksum of characters in a rectangular region.

               GetIconTitle (20)
                    Report xterm window's icon label as a string.

               GetScreenSizeChars (19)
                    Report the size of the screen in characters as numbers.

               GetSelection
                    Report selection data as a base64 string.

               GetWinPosition (13)
                    Report xterm window position as numbers.

               GetWinSizeChars (18)
                    Report the size of the text area in characters as numbers.

               GetWinSizePixels (14)
                    Report xterm window in pixels as numbers.

               GetWinState (11)
                    Report xterm window state as a number.

               GetWinTitle (21)
                    Report xterm window's title as a string.

               LowerWin (6)
                    Lower the xterm window to the bottom of the stacking order.

               MaximizeWin (9)
                    Maximize window (i.e., resize to screen size).

               FullscreenWin (10)
                    Use full screen (i.e., resize to screen size, without window
                    decorations).

               MinimizeWin (2)
                    Iconify window.

               PopTitle (23)
                    Pop title from internal stack.

               PushTitle (22)
                    Push title to internal stack.

               RaiseWin (5)
                    Raise the xterm window to the front of the stacking order.

               RefreshWin (7)
                    Refresh the xterm window.

               RestoreWin (1)
                    De-iconify window.

               SetChecksum
                    Modify algorithm for reporting checksum of characters in a
                    rectangular region.

               SetSelection
                    Set selection data.

               SetWinLines
                    Resize to a given number of lines, at least 24.

               SetWinPosition (3)
                    Move window to given coordinates.

               SetWinSizeChars (8)
                    Resize the text area to given size in characters.

               SetWinSizePixels (4)
                    Resize the xterm window to given size in pixels.

               SetXprop
                    Set X property on top-level window.

       dynamicColors (class DynamicColors)
               Specifies whether or not escape sequences to change colors
               assigned to different attributes are recognized.

       eightBitControl (class EightBitControl)
               Specifies whether or not control sequences sent by the terminal
               should be eight-bit characters or escape sequences.  The default
               is “false”.

       eightBitInput (class EightBitInput)
               If “true”, Meta characters (a single-byte character combined with
               the Meta modifier key) input from the keyboard are presented as a
               single character, modified according to the eightBitMeta
               resource.  If “false”, Meta characters are converted into a two-
               character sequence with the character itself preceded by ESC.
               The default is “true”.

               The metaSendsEscape and altSendsEscape resources may override
               this feature.  Generally keyboards do not have a key labeled
               “Meta”, but “Alt” keys are common, and they are conventionally
               used for “Meta”.  If they were synonymous, it would have been
               reasonable to name this resource “altSendsEscape”, reversing its
               sense.  For more background on this, see the meta(3x) function in
               curses.

               Note that the Alt key is not necessarily the same as the Meta
               modifier.  The xmodmap utility lists your key modifiers.  X
               defines modifiers for shift, (caps) lock and control, as well as
               5 additional modifiers which are generally used to configure key
               modifiers.  Xterm inspects the same information to find the
               modifier associated with either Meta key (left or right), and
               uses that key as the Meta modifier.  It also looks for the
               NumLock key, to recognize the modifier which is associated with
               that.

               If your xmodmap configuration uses the same keycodes for Alt- and
               Meta-keys, xterm will only see the Alt-key definitions, since
               those are tested before Meta-keys.  NumLock is tested first.  It
               is important to keep these keys distinct; otherwise some of
               xterm's functionality is not available.

               The eightBitInput resource is tested at startup time.  If “true”,
               the xterm tries to put the terminal into 8-bit mode.  If “false”,
               on startup, xterm tries to put the terminal into 7-bit mode.  For
               some configurations this is unsuccessful; failure is ignored.
               After startup, xterm does not change the terminal between 8-bit
               and 7-bit mode.

               As originally implemented in X11, the resource value did not
               change after startup.  However (since patch #216 in 2006) xterm
               can modify eightBitInput after startup via a control sequence.
               The corresponding terminfo capabilities smm (set meta mode) and
               rmm (reset meta mode) have been recognized by bash for some time.
               Interestingly enough, bash's notion of “meta mode” differs from
               the standard definition (in the terminfo manual), which describes
               the change to the eighth bit of a character.  It happens that
               bash views “meta mode” as the ESC character that xterm puts
               before a character when a special meta key is pressed.  bash's
               early documentation talks about the ESC character and ignores the
               eighth bit.

       eightBitMeta (class EightBitMeta)
               This controls the way xterm modifies the eighth bit of a single-
               byte key when the eightBitInput resource is set.  The default is
               “locale”.

               The resource value is a string, evaluated as a boolean after
               startup.

               false
                    The key is sent unmodified.

               locale
                    The key is modified only if the locale uses eight-bit
                    encoding.

               true The key is sent modified.

               never
                    The key is always sent unmodified.

               Except for the never choice, xterm honors the terminfo
               capabilities smm (set meta mode) and rmm (reset meta mode),
               allowing the feature to be turned on or off dynamically.

               If eightBitMeta is enabled when the locale uses UTF-8, xterm
               encodes the value as UTF-8 (since patch #183 in 2003).

       eightBitOutput (class EightBitOutput)
               Specifies whether or not eight-bit characters sent from the host
               should be accepted as is or stripped when printed.  The default
               is “true”, which means that they are accepted as is.

       eightBitSelectTypes (class EightBitSelectTypes)
               Override xterm's default selection target list (see SELECT/PASTE)
               for selections in normal (ISO-8859-1) mode.  The default is an
               empty string, i.e., “”, which does not override anything.

       eraseSavedLines (class EraseSavedLines)
               Specifies whether or not to allow xterm extended ED/DECSED
               control sequences to erase the saved-line buffer.  The default is
               “true”.

       faceName (class FaceName)
               Specify the pattern for scalable fonts selected from the FreeType
               library if support for that library was compiled into xterm.
               There is no default value.

               One or more fonts can be specified, separated by commas.  If
               prefixed with “x:” or “x11:” the specification applies to the
               XLFD font resource.  A “xft:” prefix is accepted but unnecessary
               since a missing prefix for faceName means that it will be used
               for TrueType.  For example,

                   XTerm*faceName: x:fixed,xft:Bitstream Vera Sans Mono

               If no faceName resource is specified, or if there is no match for
               both TrueType normal and bold fonts, xterm uses the XLFD (bitmap)
               font and related resources.

               It is possible to select suitable bitmap fonts using a script
               such as this:

                   #!/bin/sh
                   FONT=`xfontsel -print`
                   test -n "$FONT" && xfd -fn "$FONT"

               However (even though xfd accepts a “-fa” option to denote
               FreeType fonts), xfontsel has not been similarly extended.  As a
               workaround, you may try

                   fc-list :scalable=true:spacing=mono: family

               to find a list of scalable fixed-pitch fonts which may be used
               for the faceName resource value.

       faceNameDoublesize (class FaceNameDoublesize)
               Specify a double-width scalable font for cases where an
               application requires this, e.g., in CJK applications.  There is
               no default value.

               Like the faceName resource, this allows one or more comma-
               separated font specifications to be applied to the wide TrueType
               or XLFD fonts.

               If the application uses double-wide characters and this resource
               is not given, xterm will use a scaled version of the font given
               by faceName.

       faceSize (class FaceSize)
               Specify the pointsize for fonts selected from the FreeType
               library if support for that library was compiled into xterm.  The
               default is “8.0” On the VT Fonts menu, this corresponds to the
               Default entry.

               Although the default is “8.0”, this may not be the same as the
               pointsize for the default bitmap font, i.e., that assigned with
               the -fn option, or the font resource.  The default value of
               faceSize is chosen to match the size of the “fixed” font, making
               switching between bitmap and TrueType fonts via the font menu
               give comparable sizes for the window.  If your -fn option uses a
               different pointsize, you might want to adjust the faceSize
               resource to match.

               You can specify the pointsize for TrueType fonts selected with
               the other size-related menu entries such as Medium, Huge, etc.,
               by using one of the following resource values.  If you do not
               specify a value, they default to “0.0”, which causes xterm to use
               the ratio of font sizes from the corresponding bitmap font
               resources to obtain a TrueType pointsize.

               If all of the faceSize resources are set, then xterm will use
               this information to determine the next smaller/larger TrueType
               font for the larger-vt-font() and smaller-vt-font() actions.  If
               any are not set, xterm will use only the areas of the bitmap
               fonts.

       faceSize1 (class FaceSize1)
               Specifies the pointsize of the first alternative font.

       faceSize2 (class FaceSize2)
               Specifies the pointsize of the second alternative font.

       faceSize3 (class FaceSize3)
               Specifies the pointsize of the third alternative font.

       faceSize4 (class FaceSize4)
               Specifies the pointsize of the fourth alternative font.

       faceSize5 (class FaceSize5)
               Specifies the pointsize of the fifth alternative font.

       faceSize6 (class FaceSize6)
               Specifies the pointsize of the sixth alternative font.

       fastScroll (class FastScroll)
               Modifies the effect of jump scroll (jumpScroll) by suppressing
               screen refreshes for the special case when output to the screen
               has completely shifted the contents off-screen.  For instance,
               cat'ing a large file to the screen does this.

       font (class Font)
               Specifies the name of the normal font.  The default is “fixed”.

               See the discussion of the locale resource, which describes how
               this font may be overridden.

               NOTE: some resource files use patterns such as

                   *font: fixed

               which are overly broad, affecting both

                   xterm.vt100.font

               and

                   xterm.vt100.utf8Fonts.font

               which is probably not what you intended.

       font1 (class Font1)
               Specifies the name of the first alternative font, corresponding
               to “Unreadable” in the standard menu.

       font2 (class Font2)
               Specifies the name of the second alternative font, corresponding
               to “Tiny” in the standard menu.

       font3 (class Font3)
               Specifies the name of the third alternative font, corresponding
               to “Small” in the standard menu.

       font4 (class Font4)
               Specifies the name of the fourth alternative font, corresponding
               to “Medium” in the standard menu.

       font5 (class Font5)
               Specifies the name of the fifth alternative font, corresponding
               to “Large” in the standard menu.

       font6 (class Font6)
               Specifies the name of the sixth alternative font, corresponding
               to “Huge” in the standard menu.

       font7 (class Font7)
               Specifies the name of the seventh alternative font, corresponding
               to “Enormous” in the standard menu.

       fontDoublesize (class FontDoublesize)
               Specifies whether xterm should attempt to use font scaling to
               draw double-sized characters.  Some older font servers cannot do
               this properly, will return misleading font metrics.  The default
               is “true”.  If disabled, xterm will simulate double-sized
               characters by drawing normal characters with spaces between them.

       fontWarnings (class FontWarnings)
               Specify whether xterm should report an error if it fails to load
               a font:

               0    Never report an error (though the X libraries may).

               1    Report an error if the font name was given as a resource
                    setting.

               2    Always report an error on failure to load a font.

               The default is “1”.

       forceBoxChars (class ForceBoxChars)
               Specifies whether xterm should assume the normal and bold fonts
               have VT100 line-drawing characters:

               •   The fixed-pitch ISO-8859-*-encoded fonts used by xterm
                   normally have the VT100 line-drawing glyphs in cells 1–31.
                   Other fixed-pitch fonts may be more attractive, but lack
                   these glyphs.

               •   When using an ISO-10646-1 font and the wideChars resource is
                   true, xterm uses the Unicode glyphs which match the VT100
                   line-drawing glyphs.

               If “false”, xterm checks for missing glyphs in the font and makes
               line-drawing characters directly as needed.  If “true”, xterm
               assumes the font does not contain the line-drawing characters,
               and draws them directly.  The default is “false”.

               The VT100 line-drawing character set (also known as the DEC
               Special Character and Line Drawing Set) is shown in this table.
               It includes a few special characters which are not used for
               drawing lines:

               Cell   Unicode   Description
               ────────────────────────────────────────────────────────────
               0      U+25AE    black vertical rectangle
               1      U+25C6    black diamond
               2      U+2592    medium shade
               3      U+2409    symbol for horizontal tabulation
               4      U+240C    symbol for form feed
               5      U+240D    symbol for carriage return
               6      U+240A    symbol for line feed
               7      U+00B0    degree sign
               8      U+00B1    plus-minus sign
               9      U+2424    symbol for newline
               10     U+240B    symbol for vertical tabulation
               11     U+2518    box drawings light up and left
               12     U+2510    box drawings light down and left
               13     U+250C    box drawings light down and right
               14     U+2514    box drawings light up and right
               15     U+253C    box drawings light vertical and horizontal
               16     U+23BA    box drawings scan 1
               17     U+23BB    box drawings scan 3
               18     U+2500    box drawings light horizontal
               19     U+23BC    box drawings scan 7
               20     U+23BD    box drawings scan 9
               21     U+251C    box drawings light vertical and right
               22     U+2524    box drawings light vertical and left
               23     U+2534    box drawings light up and horizontal
               24     U+252C    box drawings light down and horizontal
               25     U+2502    box drawings light vertical
               26     U+2264    less-than or equal to
               27     U+2265    greater-than or equal to
               28     U+03C0    greek small letter pi
               29     U+2260    not equal to
               30     U+00A3    pound sign
               31     U+00B7    middle dot
               ────────────────────────────────────────────────────────────

       forcePackedFont (class ForcePackedFont)
               Specifies whether xterm should use the maximum or minimum glyph
               width when displaying using a bitmap font.  Use the maximum width
               to help with proportional fonts.  The default is “true”, denoting
               the minimum width.

       forceXftHeight (class ForceXftHeight)
               Specifies whether xterm should use the given font metrics for
               TrueType fonts, or amend the ascent/descent to total no more than
               the given font-height.  This optional feature is used to work
               around inconsistencies in FreeType's rounding computation.  The
               default is “false”, denoting the given metrics.

       foreground (class Foreground)
               Specifies the color to use for displaying text in the window.
               Setting the class name instead of the instance name is an easy
               way to have everything that would normally appear in the text
               color change color.  The default is “XtDefaultForeground”.

       formatOtherKeys (class FormatOtherKeys)
               Overrides the format of the escape sequence used to report
               modified keys with the modifyOtherKeys resource.

               0  send modified keys as parameters for function-key 27
                  (default).

               1  send modified keys as parameters for CSI u.

       freeBoldBox (class FreeBoldBox)
               Specifies whether xterm should assume the bounding boxes for
               normal and bold fonts are compatible.  If “false”, xterm compares
               them and will reject choices of bold fonts that do not match the
               size of the normal font.  The default is “false”, which means
               that the comparison is performed.

       geometry (class Geometry)
               Specifies the preferred size and position of the VTxxx window.
               There is no default for this resource.

       highlightColor (class HighlightColor)
               Specifies the color to use for the background of selected
               (highlighted) text.  If not specified (i.e., matching the default
               foreground), reverse video is used.  The default is
               “XtDefaultForeground”.

       highlightColorMode (class HighlightColorMode)
               Specifies whether xterm should use highlightTextColor and
               highlightColor to override the reversed foreground/background
               colors in a selection.  The default is unspecified: at startup,
               xterm checks if those resources are set to something other than
               the default foreground and background colors.  Setting this
               resource disables the check.

               The following table shows the interaction of the highlighting
               resources, abbreviated as shown to fit in this page:

               HCM
                  highlightColorMode

               HR highlightReverse

               HBG
                  highlightColor

               HFG
                  highlightTextColor

               HCM       HR      HBG       HFG       Highlight
               ────────────────────────────────────────────────
               false     false   default   default   bg/fg
               false     false   default   set       bg/fg
               false     false   set       default   fg/HBG
               false     false   set       set       fg/HBG
               ────────────────────────────────────────────────
               false     true    default   default   bg/fg
               false     true    default   set       bg/fg
               false     true    set       default   fg/HBG
               false     true    set       set       fg/HBG
               ────────────────────────────────────────────────
               true      false   default   default   bg/fg
               true      false   default   set       HFG/fg
               true      false   set       default   bg/HBG
               true      false   set       set       HFG/HBG
               ────────────────────────────────────────────────
               true      true    default   default   bg/fg
               true      true    default   set       HFG/fg
               true      true    set       default   fg/HBG
               true      true    set       set       HFG/HBG
               ────────────────────────────────────────────────
               default   false   default   default   bg/fg
               default   false   default   set       bg/fg
               default   false   set       default   fg/HBG
               default   false   set       set       HFG/HBG
               ────────────────────────────────────────────────
               default   true    default   default   bg/fg
               default   true    default   set       bg/fg
               default   true    set       default   fg/HBG
               default   true    set       set       HFG/HBG
               ────────────────────────────────────────────────

       highlightReverse (class HighlightReverse)
               Specifies whether xterm should reverse the selection foreground
               and background colors when selecting text with reverse-video
               attribute.  This applies only to the highlightColor and
               highlightTextColor resources, e.g., to match the color scheme of
               xwsh.  If “true”, xterm reverses the colors, If “false”, xterm
               does not reverse colors, The default is “true”.

       highlightSelection (class HighlightSelection)
               Tells xterm whether to highlight all of the selected positions,
               or only the selected text:

               •   If “false”, selecting with the mouse highlights all positions
                   on the screen between the beginning of the selection and the
                   current position.

               •   If “true”, xterm highlights only the positions that contain
                   text that can be selected.

               The default is “false”.

               Depending on the way your applications write to the screen, there
               may be trailing blanks on a line.  Xterm stores data as it is
               shown on the screen.  Erasing the display changes the internal
               state of each cell so it is not considered a blank for the
               purpose of selection.  Blanks written since the last erase are
               selectable.  If you do not wish to have trailing blanks in a
               selection, use the trimSelection resource.

       highlightTextColor (class HighlightTextColor)
               Specifies the color to use for the foreground of selected
               (highlighted) text.  If not specified (i.e., matching the default
               background), reverse video is used.  The default is
               “XtDefaultBackground”.

       hpLowerleftBugCompat (class HpLowerleftBugCompat)
               Specifies whether to work around a bug in HP's xdb, which ignores
               termcap and always sends ESC F to move to the lower left corner.
               “true” causes xterm to interpret ESC F as a request to move to
               the lower left corner of the screen.  The default is “false”.

       i18nSelections (class I18nSelections)
               If false, xterm will not request the targets COMPOUND_TEXT or
               TEXT.  The default is “true”.  It may be set to false in order to
               work around ICCCM violations by other X clients.

       iconBorderColor (class BorderColor)
               Specifies the border color for the active icon window if this
               feature is compiled into xterm.  Not all window managers will
               make the icon border visible.

       iconBorderWidth (class BorderWidth)
               Specifies the border width for the active icon window if this
               feature is compiled into xterm.  The default is “2”.  Not all
               window managers will make the border visible.

       iconFont (class IconFont)
               Specifies the font for the miniature active icon window, if this
               feature is compiled into xterm.  The default is “nil2”.

       initialFont (class InitialFont)
               Specifies which of the VT100 fonts to use initially.  Values are
               the same as for the set-vt-font action.  The default is “d”,
               i.e., “default”.

       inputMethod (class InputMethod)
               Tells xterm which type of input method to use.  There is no
               default method.

       internalBorder (class BorderWidth)
               Specifies the number of pixels between the characters and the
               window border.  The default is “2”.

       italicULMode (class ColorAttrMode)
               Specifies whether characters with the underline attribute should
               be displayed in an italic font or as underlined characters.  It
               is implemented only for TrueType fonts.

       jumpScroll (class JumpScroll)
               Specifies whether or not jump scroll should be used.  This
               corresponds to the VT102 DECSCLM private mode.  The default is
               “true”.  See fastScroll for a variation.

       keepClipboard (class KeepClipboard)
               Specifies whether xterm will reuse the selection data which it
               copied to the clipboard rather than asking the clipboard for its
               current contents when told to provide the selection.  The default
               is “false”.

               The menu entry Keep Clipboard allows you to change this at
               runtime.

       keepSelection (class KeepSelection)
               Specifies whether xterm will keep the selection even after the
               selected area was touched by some output to the terminal.  The
               default is “true”.

               The menu entry Keep Selection allows you to change this at
               runtime.

       keyboardDialect (class KeyboardDialect)
               Specifies the initial keyboard dialect, as well as the default
               value when the terminal is reset.  The value given is the same as
               the final character in the control sequences which change
               character sets.  The default is “B”, which corresponds to US
               ASCII.

       limitFontsets (class LimitFontsets)
               Limits the number of TrueType fallback fonts (i.e., fontset)
               which can be used.  The default is “50”.

               This limits the number of fallback fonts which xterm uses to
               display characters.  Because TrueType fonts typically are small,
               xterm may open several fonts for good coverage, and may open
               additional fonts to obtain information.  You can see which font-
               files xterm opens by setting the environment variable XFT_DEBUG
               to 3.  The Xft library and xterm write this debugging trace to
               the standard output.

               Set this to “0” to disable fallbacks entirely.

       limitResize (class LimitResize)
               Limits resizing of the screen via control sequence to a given
               multiple of the display dimensions.  The default is “1”.

       limitResponse (class LimitResponse)
               Limits the buffer-size used when xterm replies to various control
               sequences.  The default is “1024”.  The minimum value is “256”.

       locale (class Locale)
               Specifies how to use luit, an encoding converter between UTF-8
               and locale encodings.  The resource value (ignoring case) may be:

               true
                   Xterm will use the encoding specified by the users' LC_CTYPE
                   locale (i.e., LC_ALL, LC_CTYPE, or LANG variables) as far as
                   possible.  This is realized by always enabling UTF-8 mode and
                   invoking luit in non-UTF-8 locales.

               medium
                   Xterm will follow users' LC_CTYPE locale only for UTF-8, east
                   Asian, and Thai locales, where the encodings were not
                   supported by conventional 8bit mode with changing fonts.  For
                   other locales, xterm will use conventional 8bit mode.

               checkfont
                   If mini-luit is compiled-in, xterm will check if a Unicode
                   font has been specified.  If so, it checks if the character
                   encoding for the current locale is POSIX, Latin-1 or Latin-9,
                   uses the appropriate mapping to support those with the
                   Unicode font.  For other encodings, xterm assumes that UTF-8
                   encoding is required.

               false
                   Xterm will use conventional 8bit mode or UTF-8 mode according
                   to utf8 resource or -u8 option.

               Any other value, e.g., “UTF-8” or “ISO8859-2”, is assumed to be
               an encoding name; luit will be invoked to support the encoding.
               The actual list of supported encodings depends on luit.  The
               default is “medium”.

               Regardless of your locale and encoding, you need an ISO-10646-1
               font to display the result.  Your configuration may not include
               this font, or locale-support by xterm may not be needed.

               At startup, xterm uses a mechanism equivalent to the
               load-vt-fonts(utf8Fonts, Utf8Fonts) action to load font name
               subresources of the VT100 widget.  That is, resource patterns
               such as “*vt100.utf8Fonts.font” will be loaded, and (if this
               resource is enabled), override the normal fonts.  If no
               subresources are found, the normal fonts such as “*vt100.font”,
               etc., are used.

               For instance, you could have this in your resource file:

                   *VT100.font: 12x24
                   *VT100.utf8Fonts.font:9x15

               When started with a UTF-8 locale, xterm would use 9x15, but allow
               you to switch to the 12x24 font using the menu entry “UTF-8
               Fonts”.

               The resource files distributed with xterm use ISO-10646-1 fonts,
               but do not rely on them unless you are using the locale
               mechanism.

       localeFilter (class LocaleFilter)
               Specifies the file name for the encoding converter from/to locale
               encodings and UTF-8 which is used with the -lc option or locale
               resource.  The help message shown by “xterm -help” lists the
               default value, which depends on your system configuration.

               If the encoding converter requires command-line parameters, you
               can add those after the command, e.g.,

                   *localeFilter: xterm-filter -p

               Alternatively, you may put those parameter within a shell script
               to execute the converter, and set this resource to point to the
               shell script.

               When using a locale-filter, e.g., with the -e option, or the
               shell, xterm first tries passing control via that filter.  If it
               fails, xterm will retry without the locale-filter.  Xterm warns
               about the failure before retrying.

       logFile (class Logfile)
               Specify the name for xterm's log file.  If no name is specified,
               xterm will generate a name when logging is enabled, as described
               in the -l option.

       logInhibit (class LogInhibit)
               If “true”, prevent the logging feature from being enabled,
               whether by the command-line option -l, or the menu entry Log to
               File.  The default is “false”.

       logging (class Logging)
               If “true”, (and if logInhibit is not set) enable the logging
               feature.  This resource is set/updated by the -l option and the
               menu entry Log to File.  The default is “false”.

       loginShell (class LoginShell)
               Specifies whether or not the shell to be run in the window should
               be started as a login shell.  The default is “false”.

       marginBell (class MarginBell)
               Specifies whether or not the bell should be rung when the user
               types near the right margin.  The default is “false”.

       maxGraphicSize (class MaxGraphicSize)
               If xterm is configured to support ReGIS or SIXEL graphics, this
               resource controls the maximum size of a graph which can be
               displayed.

               The default is “1000x1000” (given as width by height).

               If the resource is “auto” then xterm will use the decGraphicsID
               resource (or decTerminalID if that is not set):

               Result    decGraphicsID
               ────────────────────────
               768x400             125
               800x460             240
               800x460             241
               800x480             330
               800x480             340
               860x750             382
               800x480           other

       metaSendsEscape (class MetaSendsEscape)
               Tells xterm what to do with input-characters modified by Meta:

               •   If “true”, Meta characters (a character combined with the
                   Meta modifier key) are converted into a two-character
                   sequence with the character itself preceded by ESC.  This
                   applies as well to function key control sequences, unless
                   xterm sees that Meta is used in your key translations.

               •   If “false”, Meta characters input from the keyboard are
                   handled according to the eightBitInput resource.

               The default is “False”.

       mkSamplePass (class MkSamplePass)
               If mkSampleSize is nonzero, and mkWidth (and cjkWidth) are false,
               on startup xterm compares its built-in tables to the system's
               wide character width data to decide if it will use the system's
               data.  It tests the first mkSampleSize character values, and
               allows up to mkSamplePass mismatches before the test fails.  The
               default (for the allowed number of mismatches) is 655 (one
               percent of the default value for mkSampleSize).

       mkSampleSize (class MkSampleSize)
               With mkSamplePass, this specifies a startup test used for
               initializing wide character width calculations.  The default
               (number of characters to check) is 65536.

       mkWidth (class MkWidth)
               Specifies whether xterm should use a built-in version of the wide
               character width calculation.  See also the cjkWidth resource
               which can override this.  The default is “false”.

               Here is a summary of the resources which control the choice of
               wide character width calculation:

               cjkWidth   mkWidth   Action
               ───────────────────────────────────────────────────────────────
               false      false     use system tables subject to mkSamplePass
               false      true      use built-in tables
               true       false     use built-in CJK tables
               true       true      use built-in CJK tables

               To disable mkWidth, and use the system's tables, set both
               mkSampleSize and mkSamplePass to “0”.  Doing that may make xterm
               more consistent with applications running in xterm, but may omit
               some font glyphs whose width correctly differs from the system's
               character tables.

       modifyCursorKeys (class ModifyCursorKeys)
               Tells how to handle the special case where Control-, Shift-, Alt-
               or Meta-modifiers are used to add a parameter to the escape
               sequence returned by a cursor-key.  The default is “2”:

               -1   disables the feature.

               0    uses the old/obsolete behavior, i.e., the modifier is the
                    first parameter.

               1    prefixes modified sequences with CSI.

               2    forces the modifier to be the second parameter if it would
                    otherwise be the first.

               3    marks the sequence with a “>” to hint that it is private.

       modifyFunctionKeys (class ModifyFunctionKeys)
               Tells how to handle the special case where Control-, Shift-, Alt-
               or Meta-modifiers are used to add a parameter to the escape
               sequence returned by a (numbered) function-key.  The default is
               “2”.  The resource values are similar to modifyCursorKeys:

               -1   permits the user to use shift- and control-modifiers to
                    construct function-key strings using the normal encoding
                    scheme.

               0    uses the old/obsolete behavior, i.e., the modifier is the
                    first parameter.

               1    prefixes modified sequences with CSI.

               2    forces the modifier to be the second parameter if it would
                    otherwise be the first.

               3    marks the sequence with a “>” to hint that it is private.

               If modifyFunctionKeys is zero, xterm uses Control- and Shift-
               modifiers to allow the user to construct numbered function-keys
               beyond the set provided by the keyboard:

               Control
                    adds the value given by the ctrlFKeys resource.

               Shift
                    adds twice the value given by the ctrlFKeys resource.

               Control/Shift
                    adds three times the value given by the ctrlFKeys resource.

       modifyKeyboard (class ModifyKeyboard)
               Normally xterm makes a special case regarding modifiers (shift,
               control, etc.)  to handle special keyboard layouts (legacy and
               vt220).  This is done to provide compatible keyboards for DEC
               VT220 and related terminals that implement user-defined keys
               (UDK).

               The bits of the resource value selectively enable modification of
               the given category when these keyboards are selected.  The
               default is “0”:

               0    The legacy/vt220 keyboards interpret only the Control-
                    modifier when constructing numbered function-keys.  Other
                    special keys are not modified.

               1    allows modification of the numeric keypad

               2    allows modification of the editing keypad

               4    allows modification of function-keys, overrides use of
                    Shift-modifier for UDK.

               8    allows modification of other special keys

       modifyOtherKeys (class ModifyOtherKeys)
               Like modifyCursorKeys, tells xterm to construct an escape
               sequence for ordinary (i.e., “other”) keys (such as “2”) when
               modified by Shift-, Control-, Alt- or Meta-modifiers.  This
               feature does not apply to special keys, i.e., cursor-, keypad-,
               function- or control-keys which are labeled on your keyboard.
               Those have key symbols which XKB identifies uniquely.

               For example, this feature does not apply to special control-keys
               (e.g., Escape, Tab, Enter, Backspace) Other control keys (e.g.,
               Control-I, Control-M, Control-H) may send escape sequences when
               this feature is enabled.

               The default is “0”:

               0    disables this feature.

               1    enables this feature for keys except for those with well-
                    known behavior, e.g., Tab, Backarrow and some special
                    control character cases which are built into the X11
                    library, e.g., Control-Space to make a NUL, or Control-3 to
                    make an Escape character.

                    Except for those special cases built into the X11 library,
                    the Shift- and Control- modifiers are treated normally.  The
                    Alt- and Meta- modifiers do not cause xterm to send escape
                    sequences.  Those modifier keys are interpreted according to
                    other resources, e.g., the metaSendsEscape resource.

               2    enables this feature for keys including the exceptions
                    listed.  Xterm ignores the special cases built into the X11
                    library.  Any shifted (modified) ordinary key sends an
                    escape sequence.  The Alt- and Meta- modifiers cause xterm
                    to send escape sequences.

               The Xterm FAQ has an extended discussion of this feature, with
               examples:

               https://invisible-island.net/xterm/modified-keys.html

       multiClickTime (class MultiClickTime)
               Specifies the maximum time in milliseconds between multi-click
               select events.  The default is “250” milliseconds.

       multiScroll (class MultiScroll)
               Specifies whether or not scrolling should be done asynchronously.
               The default is “false”.

       nMarginBell (class Column)
               Specifies the number of characters from the right margin at which
               the margin bell should be rung, when enabled by the marginBell
               resource.  The default is “10”.

       nameKeymap (class NameKeymap)
               See the discussion of the keymap() action.

       nextEventDelay (class NextEventDelay)
               Specifies a delay time in milliseconds before checking for new X
               events.  The default is “1”.

       numColorRegisters (class NumColorRegisters)
               If xterm is configured to support ReGIS or SIXEL graphics, this
               specifies the number of color-registers which are available.

               If this resource is not specified, xterm uses a value determined
               by the decTerminalID resource:

               Result   decTerminalID
               ───────────────────────
                    4             125
                    4             240
                    4             241
                    4             330
                   16             340
                    2             382
                 1024           other

       numLock (class NumLock)
               If “true”, xterm checks if NumLock is used as a modifier (see
               xmodmap(1)).  If so, this modifier is used to simplify the logic
               when implementing special NumLock for the sunKeyboard resource.
               Also (when sunKeyboard is false), similar logic is used to find
               the modifier associated with the left and right Alt keys.  The
               default is “true”.

       oldXtermFKeys (class OldXtermFKeys)
               If “true”, xterm will use old-style (X11R5) escape sequences for
               function keys F1 to F4, for compatibility with X Consortium
               xterm.  Otherwise, it uses the VT100 codes for PF1 to PF4.  The
               default is “false”.

               Setting this resource has the same effect as setting the
               keyboardType to legacy.  The keyboardType resource is the
               preferred mechanism for selecting this mode.

               The old-style escape sequences resemble VT220 keys, but appear to
               have been invented for xterm in X11R4.

       on2Clicks (class On2Clicks)

       on3Clicks (class On3Clicks)

       on4Clicks (class On4Clicks)

       on5Clicks (class On5Clicks)
               Specify selection behavior in response to multiple mouse clicks.
               A single mouse click is always interpreted as described in the
               Selection Functions section (see POINTER USAGE).  Multiple mouse
               clicks (using the button which activates the select-start action)
               are interpreted according to the resource values of on2Clicks,
               etc.  The resource value can be one of these:

               word
                  Select a “word” as determined by the charClass resource.  See
                  the CHARACTER CLASSES section.

               line
                  Select a line (counting wrapping).

               group
                  Select a group of adjacent lines (counting wrapping).  The
                  selection stops on a blank line, and does not extend outside
                  the current page.

               page
                  Select all visible lines, i.e., the page.

               all
                  Select all lines, i.e., including the saved lines.

               regex
                  Select the best match for the POSIX extended regular
                  expression (ERE) which follows in the resource value:

                  •   Xterm matches the regular expression against a byte array
                      for the entire (possibly wrapped) line.  That byte array
                      may be UTF-8 or ISO-8859-1, depending on the mode in which
                      xterm is running.

                  •   Xterm steps through each byte-offset in this array,
                      keeping track of the best (longest) match.  If more than
                      one match ties for the longest length, the first is used.

                      Xterm does this to make it convenient to click anywhere in
                      the area of interest and cause the regular expression to
                      match the entire word, etc.

                  •   The “^” and “$” anchors in a regular expression denote the
                      ends of the entire line.

                  •   If the regular expression contains backslashes “\” those
                      should be escaped “\\” because the X libraries interpret
                      backslashes in resource strings.

               none
                  No selection action is associated with this resource.  Xterm
                  interprets it as the end of the list.  For example, you may
                  use it to disable triple (and higher) clicking by setting
                  on3Clicks to “none”.

               The default values for on2Clicks and on3Clicks are “word” and
               “line”, respectively.  There is no default value for on4Clicks or
               on5Clicks, making those inactive.  On startup, xterm determines
               the maximum number of clicks by the onXClicks resource values
               which are set.

       openIm (class OpenIm)
               Tells xterm whether to open the input method at startup.  The
               default is “true”.

       pointerColor (class PointerColor)
               Specifies the foreground color of the pointer.  The default is
               “XtDefaultForeground”.

       pointerColorBackground (class PointerColorBackground)
               Specifies the background color of the pointer.  The default is
               “XtDefaultBackground”.

       pointerFont (class PointerFont)
               Specifies the font to be used for the pointer.  The shapes
               specified by pointerShape are glyphs in this font.  The resource
               value default is cursor.

       pointerMode (class PointerMode)
               Specifies when the pointer may be hidden as the user types.  It
               will be redisplayed if the user moves the mouse, or clicks one of
               its buttons.

               0  never

               1  the application running in xterm has not activated mouse mode.
                  This is the default.

               2  always.

       pointerShape (class Cursor)
               Specifies the name of the shape of the pointer.  The default is
               “xterm”.

       popOnBell (class PopOnBell)
               Specifies whether the window would be raised when Control-G is
               received.  The default is “false”.

               If the window is iconified, this has no effect.  However, the
               zIconBeep resource provides you with the ability to see which
               iconified windows have sounded a bell.

       precompose (class Precompose)
               Tells xterm whether to precompose UTF-8 data into Normalization
               Form C, which combines commonly-used accents onto base
               characters.  If it does not do this, accents are left as separate
               characters.  The default is “true”.

       preeditType (class PreeditType)
               Tells xterm which types of preedit (preconversion) string to
               display.  The default is “OverTheSpot,Root”.

       printAttributes (class PrintAttributes)
               Specifies whether to print graphic attributes along with the
               text.  A real DEC VTxxx terminal will print the underline,
               highlighting codes but your printer may not handle these.

               •   “0” disables the attributes.

               •   “1” prints the normal set of attributes (bold, underline,
                   inverse and blink) as VT100-style control sequences.

               •   “2” prints ANSI color attributes as well.

               The default is “1”.

       printFileImmediate (class PrintFileImmediate)
               When the print-immediate action is invoked, xterm prints the
               screen contents directly to a file.  Set this resource to the
               prefix of the filename (a timestamp will be appended to the
               actual name).

               The default is an empty string, i.e., “”, However, when the
               print-immediate action is invoked, if the string is empty, then
               “XTerm” is used.

       printFileOnXError (class PrintFileOnXError)
               If xterm exits with an X error, e.g., your connection is broken
               when the server crashes, it can be told to write the contents of
               the screen to a file.  To enable the feature, set this resource
               to the prefix of the filename (a timestamp will be appended to
               the actual name).

               The default is an empty string, i.e., “”, which disables this
               feature.  However, when the print-on-error action is invoked, if
               the string is empty, then “XTermError” is used.

               These error codes are handled: ERROR_XERROR, ERROR_XIOERROR and
               ERROR_ICEERROR.

       printModeImmediate (class PrintModeImmediate)
               When the print-immediate action is invoked, xterm prints the
               screen contents directly to a file.  You can use the
               printModeImmediate resource to tell it to use escape sequences to
               reconstruct the video attributes and colors.  This uses the same
               values as the printAttributes resource.  The default is “0”.

       printModeOnXError (class PrintModeOnXError)
               Xterm implements the printFileOnXError feature using the printer
               feature, although the output is written directly to a file.  You
               can use the printModeOnXError resource to tell it to use escape
               sequences to reconstruct the video attributes and colors.  This
               uses the same values as the printAttributes resource.  The
               default is “0”.

       printOptsImmediate (class PrintOptsImmediate)
               Specify the range of text which is printed to a file when the
               print-immediate action is invoked.

               •   If zero (0), then this selects the current (visible screen)
                   plus the saved lines, except if the alternate screen is being
                   used.  In that case, only the alternate screen is selected.

               •   If nonzero, the bits of this resource value (checked in
                   descending order) select the range:

                   8  selects the saved lines.

                   4  selects the alternate screen.

                   2  selects the normal screen.

                   1  selects the current screen, which can be either the normal
                      or alternate screen.

               The default is “9”, which selects the current visible screen plus
               saved lines, with no special case for the alternated screen.

       printOptsOnXError (class PrintOptsOnXError)
               Specify the range of text which is printed to a file when the
               print-on-error action is invoked.  The resource value is
               interpreted the same as in printOptsImmediate.

               The default is “9”, which selects the current visible screen plus
               saved lines, with no special case for the alternated screen.

       printerAutoClose (class PrinterAutoClose)
               If “true”, xterm will close the printer (a pipe) when the
               application switches the printer offline with a Media Copy
               command.  The default is “false”.

       printerCommand (class PrinterCommand)
               Specifies a shell command to which xterm will open a pipe when
               the first MC (Media Copy) command is initiated.  The default is
               an empty string, i.e., “”.  If the resource value is given as an
               empty string, the printer is disabled.

       printerControlMode (class PrinterControlMode)
               Specifies the printer control mode.  A “1” selects autoprint
               mode, which causes xterm to print a line from the screen when

               •   you move the cursor off that line with a line feed, form feed
                   or vertical tab character, or

               •   an autowrap occurs.

               Autoprint mode is overridden by printer controller mode (a “2”),
               which causes all of the output to be directed to the printer.
               The default is “0”.

       printerExtent (class PrinterExtent)
               Controls whether a print page function will print the entire page
               (true), or only the portion within the scrolling margins (false).
               The default is “false”.

       printerFormFeed (class PrinterFormFeed)
               Controls whether a form feed is sent to the printer at the end of
               a print page function.  The default is “false”.

       printerNewLine (class PrinterNewLine)
               Controls whether a newline is sent to the printer at the end of a
               print page function.  The default is “true”.

       privateColorRegisters (class PrivateColorRegisters)
               If xterm is configured to support ReGIS or SIXEL graphics, this
               controls whether xterm allocates separate color registers for
               each sixel device control string, e.g., for DECGCI.  If not true,
               color registers are allocated only once, when the terminal is
               reset, and color changes  in  any  graphic  affect all graphics.
               The default is “true”.

       quietGrab (class QuietGrab)
               Controls whether the cursor is repainted when NotifyGrab and
               NotifyUngrab event types are received during change of focus.
               The default is “false”.

       regisDefaultFont (class RegisDefaultFont)
               If xterm is configured to support ReGIS graphics, this resource
               tells xterm which font to use if the ReGIS data does not specify
               one.  No default value is specified; xterm accepts a TrueType
               font specification as in the faceName resource.

               If no value is specified, xterm draws a bitmap indicating a
               missing character.

       regisScreenSize (class RegisScreenSize)
               If xterm is configured to support ReGIS graphics, this resource
               tells xterm the default size (in pixels) for these graphics,
               which also sets the default coordinate space to [0,0] (upper-
               left) and [width,height] (lower-right).

               The application using ReGIS may use the “A” option of the “S”
               command to adjust the coordinate space or change the addressable
               portion of the screen.

               Xterm accepts a special resource value “auto”, which tells xterm
               to use the decGraphicsID and decTerminalID resources to set the
               default size based on the hardware terminal's limits.  Those
               limits are the same as for the maxGraphicSize resource.

               The default is “auto”.

       renderFont (class RenderFont)
               If xterm is built with the Xft library, this controls whether the
               faceName resource is used.  The default is “default”.

               The resource values are strings, evaluated as booleans after
               startup.

               false
                    disable the feature and use the normal (bitmap) font.

               true
                    startup using the TrueType font specified by the faceName
                    and faceSize resource settings.  If there is no value for
                    faceName, disable the feature and use the normal (bitmap)
                    font.

                    After startup, you can still switch to/from the bitmap font
                    using the “TrueType Fonts” menu entry.

               default
                    Enable the “TrueType Fonts” menu entry to allow runtime
                    switching to/from TrueType fonts.  The initial font used
                    depends upon whether the faceName resource is set:

                    •   If the faceName resource is not set, start by using the
                        normal (bitmap) font.  Xterm has a separate compiled-in
                        value for faceName for this special case.  That is
                        normally “mono”.

                    •   If the faceName resource is set, then start by using the
                        TrueType font rather than the bitmap font.

       resizeGravity (class ResizeGravity)
               Affects the behavior when the window is resized to be taller or
               shorter.  NorthWest specifies that the top line of text on the
               screen stay fixed.  If the window is made shorter, lines are
               dropped from the bottom; if the window is made taller, blank
               lines are added at the bottom.  This is compatible with the
               behavior in X11R4.  SouthWest (the default) specifies that the
               bottom line of text on the screen stay fixed.  If the window is
               made taller, additional saved lines will be scrolled down onto
               the screen; if the window is made shorter, lines will be scrolled
               off the top of the screen, and the top saved lines will be
               dropped.

       retryInputMethod (class RetryInputMethod)
               Tells xterm how many times to retry, in case the input-method
               server is not responding.  This is a different issue than
               unsupported preedit type, etc.  You may encounter retries if your
               X configuration (and its libraries) are missing pieces.  Setting
               this resource to zero “0” will cancel the retrying.  The default
               is “3”.

       reverseVideo (class ReverseVideo)
               Specifies whether or not reverse video should be simulated.  The
               default is “false”.

               There are several aspects to reverse video in xterm:

               •   The command-line -rv option tells the X libraries to reverse
                   the foreground and background colors.  Xterm's command-line
                   options set resource values.  In particular, the X Toolkit
                   sets the reverseVideo resource when the -rv option is used.

               •   If the user has also used command-line options -fg or -bg to
                   set the foreground and background colors, xterm does not see
                   these options directly.  Instead, it examines the resource
                   values to reconstruct the command-line options, and determine
                   which of the colors is the user's intended foreground, etc.
                   Their actual values are irrelevant to the reverse video
                   function; some users prefer the X defaults (black text on a
                   white background), others prefer white text on a black
                   background.

               •   After startup, the user can toggle the “Enable Reverse Video”
                   menu entry.  This exchanges the current foreground and
                   background colors of the VT100 widget, and repaints the
                   screen.  Because of the X resource hierarchy, the
                   reverseVideo resource applies to more than the VT100 widget.

               Programs running in an xterm can also use control sequences to
               enable the VT100 reverse video mode.  These are independent of
               the reverseVideo resource and the menu entry.  Xterm exchanges
               the current foreground and background colors when drawing text
               affected by these control sequences.

               Other control sequences can alter the foreground and background
               colors which are used:

               •   Programs can also use the ANSI color control sequences to set
                   the foreground and background colors.

               •   Extensions to the ANSI color controls (such as 16-, 88- or
                   256-colors) are treated similarly to the ANSI control.

               •   Using other control sequences (the “dynamic colors” feature),
                   a program can change the foreground and background colors.

       reverseWrap (class ReverseWrap)
               Specifies whether or not reverse-wraparound should be enabled.
               This corresponds to xterm's private mode 45.  The default is
               “false”.

       rightScrollBar (class RightScrollBar)
               Specifies whether or not the scrollbar should be displayed on the
               right rather than the left.  The default is “false”.

       saveLines (class SaveLines)
               Specifies the number of lines to save beyond the top of the
               screen when a scrollbar is turned on.  The default is “1024”.

       scrollBar (class ScrollBar)
               Specifies whether or not the scrollbar should be displayed.  The
               default is “false”.

       scrollBarBorder (class ScrollBarBorder)
               Specifies the width of the scrollbar border.  Note that this is
               drawn to overlap the border of the xterm window.  Modifying the
               scrollbar's border affects only the line between the VT100 widget
               and the scrollbar.  The default value is 1.

       scrollKey (class ScrollCond)
               Specifies whether or not pressing a key should automatically
               cause the scrollbar to go to the bottom of the scrolling region.
               This corresponds to xterm's private mode 1011.  The default is
               “false”.

       scrollLines (class ScrollLines)
               Specifies the number of lines that the scroll-back and
               scroll-forw actions should use as a default.  The default value
               is 1.

       scrollTtyOutput (class ScrollCond)
               Specifies whether or not output to the terminal should
               automatically cause the scrollbar to go to the bottom of the
               scrolling region.  The default is “true”.

       selectToClipboard (class SelectToClipboard)
               Tells xterm whether to use the PRIMARY or CLIPBOARD for SELECT
               tokens in the selection mechanism.  The set-select action can
               change this at runtime, allowing the user to work with programs
               that handle only one of these mechanisms.  The default is
               “false”, which tells it to use PRIMARY.

       shiftFonts (class ShiftFonts)
               Specifies whether to enable the actions larger-vt-font() and
               smaller-vt-font(), which are normally bound to the shifted KP_Add
               and KP_Subtract.  The default is “true”.

       showBlinkAsBold (class ShowBlinkAsBold)
               Tells xterm whether to display text with blink-attribute the same
               as bold.  If xterm has not been configured to support blinking
               text, the default is “true”, which corresponds to older versions
               of xterm, otherwise the default is “false”.

       showMissingGlyphs (class ShowMissingGlyphs)
               Tells xterm whether to display a box outlining places where a
               character has been used that the font does not represent.  The
               default is “false”.

       showWrapMarks (class ShowWrapMarks)
               For debugging xterm and applications that may manipulate the
               wrapped-line flag by writing text at the right margin, show a
               mark on the right inner-border of the window.  The mark shows
               which lines have the flag set.

       signalInhibit (class SignalInhibit)
               Specifies whether or not the entries in the Main Options menu for
               sending signals to xterm should be disallowed.  The default is
               “false”.

       sixelScrolling (class SixelScrolling)
               If xterm is configured to support SIXEL graphics, this resource
               tells it whether to scroll up one line at a time when sixels
               would be written past the bottom line on the window.  The default
               is “false”.

       sixelScrollsRight (class SixelScrollsRight)
               If xterm is configured to support SIXEL graphics, this resource
               tells it whether to scroll to the right as needed to keep the
               current position visible rather than truncate the plot on the on
               the right.  The default is “false”.

       tekGeometry (class Geometry)
               Specifies the preferred size and position of the Tektronix
               window.  There is no default for this resource.

       tekInhibit (class TekInhibit)
               Specifies whether or not the escape sequence to enter Tektronix
               mode should be ignored.  The default is “false”.

       tekSmall (class TekSmall)
               Specifies whether or not the Tektronix mode window should start
               in its smallest size if no explicit geometry is given.  This is
               useful when running xterm on displays with small screens.  The
               default is “false”.

       tekStartup (class TekStartup)
               Specifies whether or not xterm should start up in Tektronix mode.
               The default is “false”.

       tiXtraScroll (class TiXtraScroll)
               Specifies whether xterm should scroll to a new page when
               processing the ti termcap entry, i.e., the private modes 47, 1047
               or 1049.  This is only in effect if titeInhibit is “true”,
               because the intent of this option is to provide a picture of the
               full-screen application's display on the scrollback without
               wiping out the text that would be shown before the application
               was initialized.  The default for this resource is “false”.

       titeInhibit (class TiteInhibit)
               Originally specified whether or not xterm should remove ti and te
               termcap entries (used to switch between alternate screens on
               startup of many screen-oriented programs) from the TERMCAP
               string.

               TERMCAP is used rarely now, but xterm supports the feature on
               modern systems:

               •   If set, xterm also ignores the escape sequence to switch to
                   the alternate screen.

               •   Xterm supports terminfo in a different way, supporting
                   composite control sequences (also known as private modes)
                   1047, 1048 and 1049 which have the same effect as the
                   original 47 control sequence.

               The default for this resource is “false”.

       titleModes (class TitleModes)
               Tells xterm whether to accept or return window- and icon-labels
               in ISO-8859-1 (the default) or UTF-8.  Either can be encoded in
               hexadecimal:

               •   UTF-8 titles require special treatment, because they may
                   contain bytes which can be mistaken for control characters.
                   Hexadecimal-encoding is supported to eliminate that
                   possibility.

               •   As an alternative, you could use the allowC1Printable
                   resource, which suppresses xterm's parsing of the relevant
                   control characters (and as a result, treats those bytes as
                   data).

               The default for this resource is “0”.

               Each bit (bit “0” is 1, bit “1” is 2, etc.)  corresponds to one
               of the parameters set by the title modes control sequence:

               0    Set window/icon labels using hexadecimal

               1    Query window/icon labels using hexadecimal

               2    Set window/icon labels using UTF-8 (gives the same effect as
                    the utf8Title resource).

               3    Query window/icon labels using UTF-8

       translations (class Translations)
               Specifies the key and button bindings for menus, selections,
               “programmed strings”, etc.  The translations resource, which
               provides much of xterm's configurability, is a feature of the X
               Toolkit Intrinsics library (Xt).  See the Actions section.

       trimSelection (class TrimSelection)
               If you set highlightSelection, you can see the text which is
               selected, including any trailing spaces.  Clearing the screen (or
               a line) resets it to a state containing no spaces.  Some lines
               may contain trailing spaces when an application writes them to
               the screen.  However, you may not wish to paste lines with
               trailing spaces.  If this resource is true, xterm will trim
               trailing spaces from text which is selected.  It does not affect
               spaces which result in a wrapped line, nor will it trim the
               trailing newline from your selection.  The default is “false”.

       underLine (class UnderLine)
               This specifies whether or not text with the underline attribute
               should be underlined.  It may be desirable to disable underlining
               when color is being used for the underline attribute.  The
               default is “true”.

       useBorderClipping (class UseBorderClipping)
               Tell xterm whether to apply clipping when useClipping is false.
               Unlike useClipping, this simply limits text to keep it within the
               window borders, e.g., as a refinement to the scaleHeight
               workaround.  The default is “false”.

       useClipping (class UseClipping)
               Tell xterm whether to use clipping to keep from producing dots
               outside the text drawing area.  Originally used to work around
               for overstriking effects, this is also needed to work with some
               incorrectly-sized fonts.  The default is “true”.

       utf8 (class Utf8)
               This specifies whether xterm will run in UTF-8 mode.  If you set
               this resource, xterm also sets the wideChars resource as a side-
               effect.  The resource can be set via the menu entry “UTF-8
               Encoding”.  The default is “default”.

               Xterm accepts either a keyword (ignoring case) or the number
               shown in parentheses:

               false (0)
                  UTF-8 mode is initially off.  The command-line option +u8 sets
                  the resource to this value.  Escape sequences for turning
                  UTF-8 mode on/off are allowed.

               true (1)
                  UTF-8 mode is initially on.  Escape sequences for turning
                  UTF-8 mode on/off are allowed.

               always (2)
                  The command-line option -u8 sets the resource to this value.
                  Escape sequences for turning UTF-8 mode on/off are ignored.

               default (3)
                  This is the default value of the resource.  It is changed
                  during initialization depending on whether the locale resource
                  was set, to false (0) or always (2).  See the locale resource
                  for additional discussion of non-UTF-8 locales.

               If you want to set the value of utf8, it should be in this range.
               Other nonzero values are treated the same as “1”, i.e., UTF-8
               mode is initially on, and escape sequences for turning UTF-8 mode
               on/off are allowed.

       utf8Fonts (class Utf8Fonts)
               See the discussion of the locale resource.  This specifies
               whether xterm will use UTF-8 fonts specified via resource
               patterns such as “*vt100.utf8Fonts.font” or normal (ISO-8859-1)
               fonts via patterns such as “*vt100.font”.  The resource can be
               set via the menu entry “UTF-8 Fonts”.  The default is “default”.

               Xterm accepts either a keyword (ignoring case) or the number
               shown in parentheses:

               false (0)
                      Use the ISO-8859-1 fonts.  The menu entry is enabled,
                      allowing the choice of fonts to be changed at runtime.

               true (1)
                      Use the UTF-8 fonts.  The menu entry is enabled, allowing
                      the choice of fonts to be changed at runtime.

               always (2)
                      Always use the UTF-8 fonts.  This also disables the menu
                      entry.

               default (3)
                      At startup, the resource is set to true or false,
                      according to the effective value of the utf8 resource.

       utf8Latin1 (class Utf8Latin1)
               If true, allow an ISO-8859-1 normal font to be combined with an
               ISO-10646-1 font if the latter is given via the -fw option or its
               corresponding resource value.  The default is “false”.

       utf8SelectTypes (class Utf8SelectTypes)
               Override xterm's default selection target list (see SELECT/PASTE)
               for selections in wide-character (UTF-8) mode.  The default is an
               empty string, i.e., “”, which does not override anything.

       utf8Title (class Utf8Title)
               Applications can set xterm's title by writing a control sequence.
               Normally this control sequence follows the VT220 convention,
               which encodes the string in ISO-8859-1 and allows for an 8-bit
               string terminator.  If xterm is started in a UTF-8 locale, it
               translates the ISO-8859-1 string to UTF-8 to work with the X
               libraries which assume the string is UTF-8.

               However, some users may wish to write a title string encoded in
               UTF-8.  The window manager is responsible for drawing window
               titles.  Some window managers (not all) support UTF-8 encoding of
               window titles.  Set this resource to “true” to also set UTF-8
               encoded title strings using the EWMH properties.

               This feature is available as a menu entry, since it is related to
               the particular applications you are running within xterm.  You
               can also use a control sequence (see the discussion of “Title
               Modes” in Xterm Control Sequences), to set an equivalent flag
               (which can also be set using the titleModes resource).

               Xterm accepts either a keyword (ignoring case) or the number
               shown in parentheses:

               false (0)
                      Set only ISO-8859-1 title strings, e.g., using the ICCCM
                      WM_NAME STRING property.  The menu entry is enabled,
                      allowing the choice of title-strings to be changed at
                      runtime.

               true (1)
                      Set both the EWMH (UTF-8 strings) and the ICCCM WM_NAME,
                      etc.  The menu entry is enabled, allowing the choice to be
                      changed at runtime.

               always (2)
                      Always set both the EWMH (UTF-8 strings) and the ICCCM
                      WM_NAME, etc.  This also disables the menu entry.

               default (3)
                      At startup, the resource is set to true or false,
                      according to the effective value of the utf8 resource.

               The default is “default”.

       utf8Weblike (class Utf8Weblike)
               Provide an alternate error-handling scheme for ill-formed UTF-8
               as recommended in a W3C document.  The Unicode standard does not
               require this for conformance.  Some additional information can be
               found here:

               https://invisible-island.net/xterm/bad-utf8/

               The default is “false”.

       veryBoldColors (class VeryBoldColors)
               Specifies whether to combine video attributes with colors
               specified by colorBD, colorBL, colorIT, colorRV, and colorUL.
               The resource value is the sum of values for each attribute:
                 1 for reverse,
                 2 for underline,
                 4 for bold,
                 8 for blink, and
                 512 for italic

               The default is “0”.

       visualBell (class VisualBell)
               Specifies whether or not a visible bell (i.e., flashing) should
               be used instead of an audible bell when Control-G is received.
               The default is “false”, which tells xterm to use an audible bell.

       visualBellDelay (class VisualBellDelay)
               Number of milliseconds to delay when displaying a visual bell.
               Default is 100.  If set to zero, no visual bell is displayed.
               This is useful for very slow displays, e.g., an LCD display on a
               laptop.

       visualBellLine (class VisualBellLine)
               Specifies whether to flash only the current line when displaying
               a visual bell rather than flashing the entire screen: The default
               is “false”, which tells xterm to flash the entire screen.

       vt100Graphics (class VT100Graphics)
               This specifies whether xterm will interpret VT100 graphic
               character escape sequences while in UTF-8 mode.  The default is
               “true”, to provide support for various legacy applications.

       wideBoldFont (class WideBoldFont)
               This option specifies the font to be used for displaying bold
               wide text.  By default, it will attempt to use a font twice as
               wide as the font that will be used to draw bold text.  If no
               double-width font is found, it will improvise, by stretching the
               bold font.

       wideChars (class WideChars)
               Specifies if xterm should respond to control sequences that
               process 16-bit characters.  The default is “false”.

       wideFont (class WideFont)
               This option specifies the font to be used for displaying wide
               text.  By default, it will attempt to use a font twice as wide as
               the font that will be used to draw normal text.  If no double-
               width font is found, it will improvise, by stretching the normal
               font.

       ximFont (class XimFont)
               This option specifies the font to be used for displaying the
               preedit string in the “OverTheSpot” input method.

               In “OverTheSpot” preedit type, the preedit (preconversion) string
               is displayed at the position of the cursor.  It is the XIM
               server's responsibility to display the preedit string.  The XIM
               client must inform the XIM server of the cursor position.  For
               best results, the preedit string must be displayed with a proper
               font.  Therefore, xterm informs the XIM server of the proper
               font.  The font is be supplied by a "fontset", whose default
               value is “*”.  This matches every font, the X library
               automatically chooses fonts with proper charsets.  The ximFont
               resource is provided to override this default font setting.

   Tek4014 Widget Resources
       The following resources are specified as part of the tek4014 widget
       (class Tek4014).  These are specified by patterns such as
       “XTerm.tek4014.NAME”:

       font2 (class Font)
               Specifies font number 2 to use in the Tektronix window.

       font3 (class Font)
               Specifies font number 3 to use in the Tektronix window.

       fontLarge (class Font)
               Specifies the large font to use in the Tektronix window.

       fontSmall (class Font)
               Specifies the small font to use in the Tektronix window.

       ginTerminator (class GinTerminator)
               Specifies what character(s) should follow a GIN report or status
               report.  The possibilities are “none”, which sends no terminating
               characters, “CRonly”, which sends CR, and “CR&EOT”, which sends
               both CR and EOT.  The default is “none”.

       height (class Height)
               Specifies the height of the Tektronix window in pixels.

       initialFont (class InitialFont)
               Specifies which of the four Tektronix fonts to use initially.
               Values are the same as for the set-tek-text action.  The default
               is “large”.

       width (class Width)
               Specifies the width of the Tektronix window in pixels.

   Menu Resources
       The resources that may be specified for the various menus are described
       in the documentation for the Athena SimpleMenu widget.  The name and
       classes of the entries in each of the menus are listed below.  Resources
       named “lineN” where N is a number are separators with class SmeLine.

       As with all X resource-based widgets, the labels mentioned are customary
       defaults for the application.

       The Main Options menu (widget name mainMenu) has the following entries:

       toolbar (class SmeBSB)
               This entry invokes the set-toolbar(toggle) action.

       securekbd (class SmeBSB)
               This entry invokes the secure() action.

       allowsends (class SmeBSB)
               This entry invokes the allow-send-events(toggle) action.

       redraw (class SmeBSB)
               This entry invokes the redraw() action.

       logging (class SmeBSB)
               This entry invokes the logging(toggle) action.

       print-immediate (class SmeBSB)
               This entry invokes the print-immediate() action.

       print-on-error (class SmeBSB)
               This entry invokes the print-on-error() action.

       print (class SmeBSB)
               This entry invokes the print() action.

       print-redir (class SmeBSB)
               This entry invokes the print-redir() action.

       dump-html (class SmeBSB)
               This entry invokes the dump-html() action.

       dump-svg (class SmeBSB)
               This entry invokes the dump-svg() action.

       8-bit-control (class SmeBSB)
               This entry invokes the set-8-bit-control(toggle) action.

       backarrow key (class SmeBSB)
               This entry invokes the set-backarrow(toggle) action.

       num-lock (class SmeBSB)
               This entry invokes the set-num-lock(toggle) action.

       alt-esc (class SmeBSB)
               This entry invokes the alt-sends-escape(toggle) action.

       meta-esc (class SmeBSB)
               This entry invokes the meta-sends-escape(toggle) action.

       delete-is-del (class SmeBSB)
               This entry invokes the delete-is-del(toggle) action.

       oldFunctionKeys (class SmeBSB)
               This entry invokes the set-old-function-keys(toggle) action.

       hpFunctionKeys (class SmeBSB)
               This entry invokes the set-hp-function-keys(toggle) action.

       scoFunctionKeys (class SmeBSB)
               This entry invokes the set-sco-function-keys(toggle) action.

       sunFunctionKeys (class SmeBSB)
               This entry invokes the set-sun-function-keys(toggle) action.

       sunKeyboard (class SmeBSB)
               This entry invokes the sunKeyboard(toggle) action.

       suspend (class SmeBSB)
               This entry invokes the send-signal(tstp) action on systems that
               support job control.

       continue (class SmeBSB)
               This entry invokes the send-signal(cont) action on systems that
               support job control.

       interrupt (class SmeBSB)
               This entry invokes the send-signal(int) action.

       hangup (class SmeBSB)
               This entry invokes the send-signal(hup) action.

       terminate (class SmeBSB)
               This entry invokes the send-signal(term) action.

       kill (class SmeBSB)
               This entry invokes the send-signal(kill) action.

       quit (class SmeBSB)
               This entry invokes the quit() action.

       The VT Options menu (widget name vtMenu) has the following entries:

       scrollbar (class SmeBSB)
               This entry invokes the set-scrollbar(toggle) action.

       jumpscroll (class SmeBSB)
               This entry invokes the set-jumpscroll(toggle) action.

       reversevideo (class SmeBSB)
               This entry invokes the set-reverse-video(toggle) action.

       autowrap (class SmeBSB)
               This entry invokes the set-autowrap(toggle) action.

       reversewrap (class SmeBSB)
               This entry invokes the set-reversewrap(toggle) action.

       autolinefeed (class SmeBSB)
               This entry invokes the set-autolinefeed(toggle) action.

       appcursor (class SmeBSB)
               This entry invokes the set-appcursor(toggle) action.

       appkeypad (class SmeBSB)
               This entry invokes the set-appkeypad(toggle) action.

       scrollkey (class SmeBSB)
               This entry invokes the set-scroll-on-key(toggle) action.

       scrollttyoutput (class SmeBSB)
               This entry invokes the set-scroll-on-tty-output(toggle) action.

       allow132 (class SmeBSB)
               This entry invokes the set-allow132(toggle) action.

       cursesemul (class SmeBSB)
               This entry invokes the set-cursesemul(toggle) action.

       keepSelection (class SmeBSB)
               This entry invokes the set-keep-selection(toggle) action.

       selectToClipboard (class SmeBSB)
               This entry invokes the set-keep-clipboard(toggle) action.

       visualbell (class SmeBSB)
               This entry invokes the set-visual-bell(toggle) action.

       bellIsUrgent (class SmeBSB)
               This entry invokes the set-bellIsUrgent(toggle) action.

       poponbell (class SmeBSB)
               This entry invokes the set-pop-on-bell(toggle) action.

       cursorblink (class SmeBSB)
               This entry invokes the set-cursorblink(toggle) action.

       titeInhibit (class SmeBSB)
               This entry invokes the set-titeInhibit(toggle) action.

       activeicon (class SmeBSB)
               This entry toggles active icons on and off if this feature was
               compiled into xterm.  It is enabled only if xterm was started
               with the command line option +ai or the activeIcon resource is
               set to “true”.

       softreset (class SmeBSB)
               This entry invokes the soft-reset() action.

       hardreset (class SmeBSB)
               This entry invokes the hard-reset() action.

       clearsavedlines (class SmeBSB)
               This entry invokes the clear-saved-lines() action.

       tekshow (class SmeBSB)
               This entry invokes the set-visibility(tek,toggle) action.

       tekmode (class SmeBSB)
               This entry invokes the set-terminal-type(tek) action.

       vthide (class SmeBSB)
               This entry invokes the set-visibility(vt,off) action.

       altscreen (class SmeBSB)
               This entry invokes the set-altscreen(toggle) action.

       sixelScrolling (class SmeBSB)
               This entry invokes the set-sixel-scrolling(toggle) action.

       privateColorRegisters (class SmeBSB)
               This entry invokes the set-private-colors(toggle) action.

       The VT Fonts menu (widget name fontMenu) has the following entries:

       fontdefault (class SmeBSB)
               This entry invokes the set-vt-font(d) action, setting the font
               using the font (default) resource, e.g., “Default” in the menu.

       font1 (class SmeBSB)
               This entry invokes the set-vt-font(1) action, setting the font
               using the font1 resource, e.g., “Unreadable” in the menu.

       font2 (class SmeBSB)
               This entry invokes the set-vt-font(2) action, setting the font
               using the font2 resource, e.g., “Tiny” in the menu.

       font3 (class SmeBSB)
               This entry invokes the set-vt-font(3) action, setting the font
               using the font3 resource, e.g., “Small” in the menu.

       font4 (class SmeBSB)
               This entry invokes the set-vt-font(4) action, letting the font
               using the font4 resource, e.g., “Medium” in the menu.

       font5 (class SmeBSB)
               This entry invokes the set-vt-font(5) action, letting the font
               using the font5 resource, e.g., “Large” in the menu.

       font6 (class SmeBSB)
               This entry invokes the set-vt-font(6) action, letting the font
               using the font6 resource, e.g., “Huge” in the menu.

       font7 (class SmeBSB)
               This entry invokes the set-vt-font(7) action, letting the font
               using the font7 resource, e.g., “Enormous” in the menu.

       fontescape (class SmeBSB)
               This entry invokes the set-vt-font(e) action.

       fontsel (class SmeBSB)
               This entry invokes the set-vt-font(s) action.

       allow-bold-fonts (class SmeBSB)
               This entry invokes the allow-bold-fonts(toggle) action.

       font-linedrawing (class SmeBSB)
               This entry invokes the set-font-linedrawing(s) action.

       font-packed (class SmeBSB)
               This entry invokes the set-font-packed(s) action.

       font-doublesize (class SmeBSB)
               This entry invokes the set-font-doublesize(s) action.

       render-font (class SmeBSB)
               This entry invokes the set-render-font(s) action.

       utf8-fonts (class SmeBSB)
               This entry invokes the set-utf8-fonts(s) action.

       utf8-mode (class SmeBSB)
               This entry invokes the set-utf8-mode(s) action.

       utf8-title (class SmeBSB)
               This entry invokes the set-utf8-title(s) action.

       allow-color-ops (class SmeBSB)
               This entry invokes the allow-color-ops(toggle) action.

       allow-font-ops (class SmeBSB)
               This entry invokes the allow-fonts-ops(toggle) action.

       allow-tcap-ops (class SmeBSB)
               This entry invokes the allow-tcap-ops(toggle) action.

       allow-title-ops (class SmeBSB)
               This entry invokes the allow-title-ops(toggle) action.

       allow-window-ops (class SmeBSB)
               This entry invokes the allow-window-ops(toggle) action.

       The Tek Options menu (widget name tekMenu) has the following entries:

       tektextlarge (class SmeBSB)
               This entry invokes the set-tek-text(large) action.

       tektext2 (class SmeBSB)
               This entry invokes the set-tek-text(2) action.

       tektext3 (class SmeBSB)
               This entry invokes the set-tek-text(3) action.

       tektextsmall (class SmeBSB)
               This entry invokes the set-tek-text(small) action.

       tekpage (class SmeBSB)
               This entry invokes the tek-page() action.

       tekreset (class SmeBSB)
               This entry invokes the tek-reset() action.

       tekcopy (class SmeBSB)
               This entry invokes the tek-copy() action.

       vtshow (class SmeBSB)
               This entry invokes the set-visibility(vt,toggle) action.

       vtmode (class SmeBSB)
               This entry invokes the set-terminal-type(vt) action.

       tekhide (class SmeBSB)
               This entry invokes the set-visibility(tek,toggle) action.

   Scrollbar Resources
       The following resources are useful when specified for the Athena
       Scrollbar widget:

       background (class Background)
               Specifies the color to use for the background of the scrollbar.

       foreground (class Foreground)
               Specifies the color to use for the foreground of the scrollbar.

       thickness (class Thickness)
               Specifies the width in pixels of the scrollbar (default: 14).

               This may be overridden by the width resource.

       thumb (class Thumb)
               The default “thumb” pixmap used for the scrollbar is a simple
               checkerboard pattern alternating pixels for foreground and
               background color.

       width (class Width)
               Specifies the width in pixels of the scrollbar (default: 0).

               The widget checks the width resource first, using the thickness
               value if the width is zero.

POINTER USAGE
       Once the VTxxx window is created, xterm allows you to select text and
       copy it within the same or other windows using the pointer or the
       keyboard.

       A “pointer” could be a mouse, touchpad or similar device.  X applications
       generally do not care, since they see only button events which have

       •   position and

       •   button up/down state

       Xterm can see these events as long as it has focus.

       The keyboard also supplies events, but it is less flexible than the
       pointer for selecting/copying text.

       Events are applied to actions using the translations resource.  See
       Actions for a complete list, and Default Key Bindings for the built-in
       set of translations resources.

   Selection Functions
       By default, the selection functions are invoked when the pointer buttons
       are used with no modifiers, and when they are used with the “shift” key.
       The “shift” key is special, because xterm uses that to ensure that
       selection functions are still available when it is programmed to send
       escape sequences in one of the mouse modes (see Xterm Control Sequences,
       as well as the resource disallowedMouseOps).

       At startup, xterm inspects the translations resource to see which pointer
       buttons may be used in this way, and remembers these buttons when
       deciding whether to send escape sequences or perform selection when those
       buttons are used with the “shift” modifier.  Other pointer buttons, e.g.,
       typically those sent for wheel mouse events, are not affected.

       The assignment of the functions described below to keys and buttons may
       be changed through the resource database; see Actions below.

       Pointer button one (usually left)
            is used to save text into the cut buffer:

                ~Meta <Btn1Down>:select-start()

            Move the cursor to beginning of the text, and then hold the button
            down while moving the cursor to the end of the region and releasing
            the button.  The selected text is highlighted and is saved in the
            global cut buffer and made the selection when the button is
            released:

                <BtnUp>:select-end(SELECT, CUT_BUFFER0) \n

            Normally (but see the discussion of on2Clicks, etc):

            •   Double-clicking selects by words.

            •   Triple-clicking selects by lines.

            •   Quadruple-clicking goes back to characters, etc.

            Multiple-click is determined by the time from button up to button
            down, so you can change the selection unit in the middle of a
            selection.  Logical words and lines selected by double- or triple-
            clicking may wrap across more than one screen line if lines were
            wrapped by xterm itself rather than by the application running in
            the window.  If the key/button bindings specify that an X selection
            is to be made, xterm will leave the selected text highlighted for as
            long as it is the selection owner.

       Pointer button two (usually middle)
            “types” (pastes) the text from the given selection, if any,
            otherwise from the cut buffer, inserting it as keyboard input:

                ~Ctrl ~Meta <Btn2Up>:insert-selection(SELECT, CUT_BUFFER0)

       Pointer button three (usually right)
            extends the current selection.

                ~Ctrl ~Meta <Btn3Down>:start-extend()

            (Without loss of generality, you can swap “right” and “left”
            everywhere in the rest of this paragraph.)  If pressed while closer
            to the right edge of the selection than the left, it
            extends/contracts the right edge of the selection.  If you contract
            the selection past the left edge of the selection, xterm assumes you
            really meant the left edge, restores the original selection, then
            extends/contracts the left edge of the selection.  Extension starts
            in the selection unit mode that the last selection or extension was
            performed in; you can multiple-click to cycle through them.

       By cutting and pasting pieces of text without trailing new lines, you can
       take text from several places in different windows and form a command to
       the shell, for example, or take output from a program and insert it into
       your favorite editor.  Since cut buffers are globally shared among
       different applications, you may regard each as a “file” whose contents
       you know.  The terminal emulator and other text programs should be
       treating it as if it were a text file, i.e., the text is delimited by new
       lines.

   Scrolling
       The scroll region displays the position and amount of text currently
       showing in the window (highlighted) relative to the amount of text
       actually saved.  As more text is saved (up to the maximum), the size of
       the highlighted area decreases.

       Clicking button one with the pointer in the scroll region moves the
       adjacent line to the top of the display window.

       Clicking button three moves the top line of the display window down to
       the pointer position.

       Clicking button two moves the display to a position in the saved text
       that corresponds to the pointer's position in the scrollbar.

   Tektronix Pointer
       Unlike the VTxxx window, the Tektronix window does not allow the copying
       of text.  It does allow Tektronix GIN mode, and in this mode the cursor
       will change from an arrow to a cross.  Pressing any key will send that
       key and the current coordinate of the cross cursor.  Pressing button one,
       two, or three will return the letters “l”, “m”, and “r”, respectively.
       If the “shift” key is pressed when a pointer button is pressed, the
       corresponding upper case letter is sent.  To distinguish a pointer button
       from a key, the high bit of the character is set (but this is bit is
       normally stripped unless the terminal mode is RAW; see tty(4) for
       details).

SELECT/PASTE
       X clients provide select and paste support by responding to requests
       conveyed by the X server.  The X server holds data in “atoms” which
       correspond to the different types of selection (PRIMARY, SECONDARY,
       CLIPBOARD) as well as the similar cut buffer mechanism (CUT_BUFFER0 to
       CUT_BUFFER7).  Those are documented in the ICCCM.

       The ICCCM deals with the underlying mechanism for select/paste.  It does
       not mention highlighting.  The selection is not the same as highlighting.
       Xterm (like many applications) uses highlighting to show you the
       currently selected text.  An X application may own a selection, which
       allows it to be the source of data copied using a given selection atom
       Xterm may continue owning a selection after it stops highlighting (see
       keepSelection).

   PRIMARY
       When configured to use the primary selection (the default), xterm can
       provide the selection data in ways which help to retain character
       encoding information as it is pasted.

       The PRIMARY token is a standard X feature, documented in the ICCCM
       (Inter-Client Communication Conventions Manual), which states

          The selection named by the atom PRIMARY is used for all commands that
          take only a single argument and is the principal means of
          communication between clients that use the selection mechanism.

       A user “selects” text on xterm, which highlights the selected text.  A
       subsequent “paste” to another client forwards a request to the client
       owning the selection.  If xterm owns the primary selection, it makes the
       data available in the form of one or more “selection targets”.  If it
       does not own the primary selection, e.g., if it has released it or
       another client has asserted ownership, it relies on cut-buffers to pass
       the data.  But cut-buffers handle only ISO-8859-1 data (officially - some
       clients ignore the rules).

   CLIPBOARD
       When configured to use the clipboard (using the selectToClipboard
       resource), the problem with persistence of ownership is bypassed.
       Otherwise, there is no difference regarding the data which can be passed
       via selection.

       The selectToClipboard resource is a compromise, allowing CLIPBOARD to be
       treated almost like PRIMARY, unlike the ICCCM, which describes CLIPBOARD
       in different terms than PRIMARY or SECONDARY.  Its lengthy explanation
       begins with the essential points:

          The selection named by the atom CLIPBOARD is used to hold data that is
          being transferred between clients, that is, data that usually is being
          cut and then pasted or copied and then pasted.  Whenever a client
          wants to transfer data to the clipboard:

          •   It should assert ownership of the CLIPBOARD.

          •   If it succeeds in acquiring ownership, it should be prepared to
              respond to a request for the contents of the CLIPBOARD in the
              usual way (retaining the data to be able to return it).  The
              request may be generated by the clipboard client described below.

   SELECT
       However, many applications use CLIPBOARD in imitation of other windowing
       systems.  The selectToClipboard resource (and corresponding menu entry
       Select to Clipboard) introduce the SELECT token (known only to xterm)
       which chooses between the PRIMARY and CLIPBOARD tokens.

       Without using this feature, one can use workarounds such as the xclip
       program to show the contents of the X clipboard within an xterm window.

   SECONDARY
       This is used less often than PRIMARY or CLIPBOARD.  According to the
       ICCCM, it is used

       •   As the second argument to commands taking two arguments (for example,
           “exchange primary and secondary selections”)

       •   As a means of obtaining data when there is a primary selection and
           the user does not want to disturb it

   Selection Targets
       The different types of data which are passed depend on what the receiving
       client asks for.  These are termed selection targets.

       When asking for the selection data, xterm tries the following types in
       this order:

            UTF8_STRING
                 This is an XFree86 extension, which denotes that the data is
                 encoded in UTF-8.  When xterm is built with wide-character
                 support, it both accepts and provides this type.

            TEXT the text is in the encoding which corresponds to your current
                 locale.

            COMPOUND_TEXT
                 this is a format for multiple character set data, such as
                 multi-lingual text.  It can store UTF-8 data as a special case.

            STRING
                 This is Latin 1 (ISO-8859-1) data.

       The middle two (TEXT and COMPOUND_TEXT) are added if xterm is configured
       with the i18nSelections resource set to “true”.

       UTF8_STRING is preferred (therefore first in the list) since xterm stores
       text as Unicode data when running in wide-character mode, and no
       translation is needed.  On the other hand, TEXT and COMPOUND_TEXT may
       require translation.  If the translation is incomplete, they will insert
       X's “defaultString” whose value cannot be set, and may simply be empty.
       Xterm's defaultString resource specifies the string to use for incomplete
       translations of the UTF8_STRING.

       You can alter the types which xterm tries using the eightBitSelectTypes
       or utf8SelectTypes resources.  For instance, you might have some specific
       locale setting which does not use UTF-8 encoding.  The resource value is
       a comma-separated list of the selection targets, which consist of the
       names shown.  You can use the special name I18N to denote the optional
       inclusion of TEXT and COMPOUND_TEXT.  The names are matched ignoring
       case, and can be abbreviated.  The default list can be expressed in
       several ways, e.g.,

              UTF8_STRING,I18N,STRING
              utf8,i18n,string
              u,i,s

   Mouse Protocol
       Applications can send escape sequences to xterm to cause it to send
       escape sequences back to the computer when you press a pointer button, or
       even (depending on which escape sequence) send escape sequences back to
       the computer as you move the pointer.

       These escape sequences and the responses, called the mouse protocol, are
       documented in XTerm Control Sequences.  They do not appear in the actions
       invoked by the translations resource because the resource does not change
       while you run xterm, whereas applications can change the mouse prototol
       (i.e., enable, disable, use different modes).

       However, the mouse protocol is interpreted within the actions that are
       usually associated with the pointer buttons.  Xterm ignores the mouse
       protocol in the insert-selection action if the shift-key is pressed at
       the same time.  It also modifies a few other actions if the shift-key is
       pressed, e.g., suppressing the response with the pointer position, though
       not eliminating changes to the selected text.

MENUS
       Xterm has four menus, named mainMenu, vtMenu, fontMenu, and tekMenu.
       Each menu pops up under the correct combinations of key and button
       presses.  Each menu is divided into sections, separated by a horizontal
       line.  Some menu entries correspond to modes that can be altered.  A
       check mark appears next to a mode that is currently active.  Selecting
       one of these modes toggles its state.  Other menu entries are commands;
       selecting one of these performs the indicated function.

       All of the menu entries correspond to X actions.  In the list below, the
       menu label is shown followed by the action's name in parenthesis.

   Main Options
       The xterm mainMenu pops up when the “control” key and pointer button one
       are pressed in a window.  This menu contains items that apply to both the
       VTxxx and Tektronix windows.  There are several sections:

       Commands for managing X events:

              Toolbar (resource toolbar)
                     Clicking on the “Toolbar” menu entry hides the toolbar if
                     it is visible, and shows it if it is not.

              Secure Keyboard (resource securekbd)
                     The Secure Keyboard mode is helpful when typing in
                     passwords or other sensitive data in an unsecure
                     environment (see SECURITY below, but read the limitations
                     carefully).

              Allow SendEvents (resource allowsends)
                     Specifies whether or not synthetic key and button events
                     generated using the X protocol SendEvent request should be
                     interpreted or discarded.  This corresponds to the
                     allowSendEvents resource.

              Redraw Window (resource redraw)
                     Forces the X display to repaint; useful in some
                     environments.

       Commands for capturing output:

              Log to File (resource logging)
                     Captures text sent to the screen in a log file, as in the
                     -l logging option.

              Print-All Immediately (resource print-immediate)
                     Invokes the print-immediate action, sending the text of the
                     current window directly to a file, as specified by the
                     printFileImmediate, printModeImmediate and
                     printOptsImmediate resources.

              Print-All on Error (resource print-on-error)
                     Invokes the print-on-error action, which toggles a flag
                     telling xterm that if it exits with an X error, to send the
                     text of the current window directly to a file, as specified
                     by the printFileOnXError, printModeOnXError and
                     printOptsOnXError resources.

              Print Window (resource print)
                     Sends the text of the current window to the program given
                     in the printerCommand resource.

              Redirect to Printer (resource print-redir)
                     This sets the printerControlMode to 0 or 2.  You can use
                     this to turn the printer on as if an application had sent
                     the appropriate control sequence.  It is also useful for
                     switching the printer off if an application turns it on
                     without resetting the print control mode.

              XHTML Screen Dump (resource dump-html)
                     Available only when compiled with screen dump support.
                     Invokes the dump-html action.  This creates an XHTML file
                     matching the contents of the current screen, including the
                     border, internal border, colors and most attributes: bold,
                     italic, underline, faint, strikeout, reverse; blink is
                     rendered as white-on-red; double underline is rendered the
                     same as underline since there is no portable equivalent in
                     CSS 2.2.

                     The font is whatever your browser uses for preformatted
                     (<pre>) elements.  The XHTML file references a cascading
                     style sheet (CSS) named “xterm.css” that you can create to
                     select a font or override properties.

                     The following CSS selectors are used with the expected
                     default behavior in the XHTML file:

                     .ul for underline,
                     .bd for bold,
                     .it for italic,
                     .st for strikeout,
                     .lu for strikeout combined with underline.

                     In addition you may use

                     .ev to affect even numbered lines and
                     .od to affect odd numbered lines.

                     Attributes faint, reverse and blink are implemented as
                     style attributes setting color properties.  All colors are
                     specified as RGB percentages in order to support displays
                     with 10 bits per RGB.

                     The name of the file will be

                         xterm.yyyy.MM.dd.hh.mm.ss.xhtml

                     where yyyy, MM, dd, hh, mm and ss are the year, month, day,
                     hour, minute and second when the screen dump was performed
                     (the file is created in the directory xterm is started in,
                     or the home directory for a login xterm).

                     The dump-html action can also be triggered using the Media
                     Copy control sequence CSI 1 0 i, for example from a shell
                     script with

                         printf '\033[10i'

                     Only the UTF-8 encoding is supported.

              SVG Screen Dump (resource dump-svg)
                     Available only when compiled with screen dump support.
                     Invokes the dump-svg action.  This creates a Scalable
                     Vector Graphics (SVG) file matching the contents of the
                     current screen, including the border, internal border,
                     colors and most attributes: bold, italic, underline, double
                     underline, faint, strikeout, reverse; blink is rendered as
                     white-on-red.  The font is whatever your renderer uses for
                     the monospace font-family.  All colors are specified as RGB
                     percentages in order to support displays with 10 bits per
                     RGB.

                     The name of the file will be

                         xterm.yyyy.MM.dd.hh.mm.ss.svg

                     where yyyy, MM, dd, hh, mm and ss are the year, month, day,
                     hour, minute and second when the screen dump was performed
                     (the file is created in the directory xterm is started in,
                     or the home directory for a login xterm).

                     The dump-svg action can also be triggered using the Media
                     Copy control sequence CSI 1 1 i, for example from a shell
                     script with

                         printf '\033[11i'

                     Only the UTF-8 encoding is supported.

       Modes for setting keyboard style:

              8-Bit Controls (resource 8-bit-control)
                     Enabled for VT220 emulation, this controls whether xterm
                     will send 8-bit control sequences rather than using 7-bit
                     (ASCII) controls, e.g., sending a byte in the range 128–159
                     rather than the escape character followed by a second byte.
                     Xterm always interprets both 8-bit and 7-bit control
                     sequences (see Xterm Control Sequences).  This corresponds
                     to the eightBitControl resource.

              Backarrow Key (BS/DEL) (resource backarrow key)
                     Modifies the behavior of the backarrow key, making it
                     transmit either a backspace (8) or delete (127) character.
                     This corresponds to the backarrowKey resource.

              Alt/NumLock Modifiers (resource num-lock)
                     Controls the treatment of Alt- and NumLock-key modifiers.
                     This corresponds to the numLock resource.

              Meta Sends Escape (resource meta-esc)
                     Controls whether Meta keys are converted into a two-
                     character sequence with the character itself preceded by
                     ESC.  This corresponds to the metaSendsEscape resource.

              Delete is DEL (resource delete-is-del)
                     Controls whether the Delete key on the editing keypad
                     should send DEL (127) or the VT220-style Remove escape
                     sequence.  This corresponds to the deleteIsDEL resource.

              Old Function-Keys (resource oldFunctionKeys)

              HP Function-Keys (resource hpFunctionKeys)

              SCO Function-Keys (resource scoFunctionKeys)

              Sun Function-Keys (resource sunFunctionKeys)

              VT220 Keyboard (resource sunKeyboard)
                     These act as a radio-button, selecting one style for the
                     keyboard layout.  The layout corresponds to more than one
                     resource setting: sunKeyboard, sunFunctionKeys,
                     scoFunctionKeys and hpFunctionKeys.

       Commands for process signalling:

              Send STOP Signal (resource suspend)

              Send CONT Signal (resource continue)

              Send INT Signal (resource interrupt)

              Send HUP Signal (resource hangup)

              Send TERM Signal (resource terminate)

              Send KILL Signal (resource kill)
                     These send the SIGTSTP, SIGCONT, SIGINT, SIGHUP, SIGTERM
                     and SIGKILL signals respectively, to the process group of
                     the process running under xterm (usually the shell).  The
                     SIGCONT function is especially useful if the user has
                     accidentally typed CTRL-Z, suspending the process.

              Quit (resource quit)
                     Stop processing X events except to support the -hold
                     option, and then send a SIGHUP signal to the process group
                     of the process running under xterm (usually the shell).

   VT Options
       The xterm vtMenu sets various modes in the VTxxx emulation, and is popped
       up when the “control” key and pointer button two are pressed in the VTxxx
       window.

       VTxxx Modes:

              Enable Scrollbar (resource scrollbar)
                     Enable (or disable) the scrollbar.  This corresponds to the
                     -sb option and the scrollBar resource.

              Enable Jump Scroll (resource jumpscroll)
                     Enable (or disable) jump scrolling.  This corresponds to
                     the -j option and the jumpScroll resource.

              Enable Reverse Video (resource reversevideo)
                     Enable (or disable) reverse-video.  This corresponds to the
                     -rv option and the reverseVideo resource.

              Enable Auto Wraparound (resource autowrap)
                     Enable (or disable) auto-wraparound.  This corresponds to
                     the -aw option and the autoWrap resource.

              Enable Reverse Wraparound (resource reversewrap)
                     Enable (or disable) reverse wraparound.  This corresponds
                     to the -rw option and the reverseWrap resource.

              Enable Auto Linefeed (resource autolinefeed)
                     Enable (or disable) auto-linefeed.  This is the VT102 NEL
                     function, which causes the emulator to emit a line feed
                     after each carriage return.  There is no corresponding
                     command-line option or resource setting.

              Enable Application Cursor Keys (resource appcursor)
                     Enable (or disable) application cursor keys.  This
                     corresponds to the appcursorDefault resource.  There is no
                     corresponding command-line option.

              Enable Application Keypad (resource appkeypad)
                     Enable (or disable) application keypad keys.  This
                     corresponds to the appkeypadDefault resource.  There is no
                     corresponding command-line option.

              Scroll to Bottom on Key Press (resource scrollkey)
                     Enable (or disable) scrolling to the bottom of the
                     scrolling region on a keypress.  This corresponds to the
                     -sk option and the scrollKey resource.

                     As a special case, the XON / XOFF keys (control/S and
                     control/Q) are ignored.

              Scroll to Bottom on Tty Output (resource scrollttyoutput)
                     Enable (or disable) scrolling to the bottom of the
                     scrolling region on output to the terminal.  This
                     corresponds to the -si option and the scrollTtyOutput
                     resource.

              Allow 80/132 Column Switching (resource allow132)
                     Enable (or disable) switching between 80 and 132 columns.
                     This corresponds to the -132 option and the c132 resource.

              Keep Selection (resource keepSelection)
                     Tell xterm whether to disown the selection when it stops
                     highlighting it, e.g., when an application modifies the
                     display so that it no longer matches the text which has
                     been highlighted.  As long as xterm continues to own the
                     selection for a given atom, it can provide the
                     corresponding text to other clients which request the
                     selection using that atom.

                     This corresponds to the keepSelection resource.  There is
                     no corresponding command-line option.

                     Telling xterm to not disown the selection does not prevent
                     other applications from taking ownership of the selection.
                     When that happens, xterm receives notification that this
                     has happened, and removes its highlighting.

                     See SELECT/PASTE for more information.

              Select to Clipboard (resource selectToClipboard)
                     Tell xterm whether to use the PRIMARY or CLIPBOARD for
                     SELECT tokens in the translations resource which maps
                     keyboard and mouse actions to select/paste actions.

                     This corresponds to the selectToClipboard resource.  There
                     is no corresponding command-line option.

                     The keepSelection resource setting applies to CLIPBOARD
                     selections just as it does for PRIMARY selections.  However
                     some window managers treat the clipboard specially.  For
                     instance, XQuartz's synchronization between the OSX
                     pasteboard and the X11 clipboard causes applications to
                     lose the selection ownership for that atom when a selection
                     is copied to the clipboard.

                     See SELECT/PASTE for more information.

              Enable Visual Bell (resource visualbell)
                     Enable (or disable) visible bell (i.e., flashing) instead
                     of an audible bell.  This corresponds to the -vb option and
                     the visualBell resource.

              Enable Bell Urgency (resource bellIsUrgent)
                     Enable (or disable) Urgency window manager hint when
                     Control-G is received.  This corresponds to the
                     bellIsUrgent resource.

              Enable Pop on Bell (resource poponbell)
                     Enable (or disable) raising of the window when Control-G is
                     received.  This corresponds to the -pop option and the
                     popOnBell resource.

              Enable Blinking Cursor (resource cursorblink)
                     Enable (or disable) the blinking-cursor feature.  This
                     corresponds to the -bc option and the cursorBlink resource.
                     There are also escape sequences (see Xterm Control
                     Sequences):

                     •   If the cursorBlinkXOR resource is set, the menu entry
                         and the escape sequence states will be XOR'd: if both
                         are enabled, the cursor will not blink, if only one is
                         enabled, the cursor will blink.

                     •   If the cursorBlinkXOR is not set; if either the menu
                         entry or the escape sequence states are set, the cursor
                         will blink.

                     In either case, the checkbox for the menu shows the state
                     of the cursorBlink resource, which may not correspond to
                     what the cursor is actually doing.

              Enable Alternate Screen Switching (resource titeInhibit)
                     Enable (or disable) switching between the normal and
                     alternate screens.  This corresponds to the titeInhibit
                     resource.  There is no corresponding command-line option.

              Enable Active Icon (resource activeicon)
                     Enable (or disable) the active-icon feature.  This
                     corresponds to the -ai option and the activeIcon resource.

              Sixel Scrolling (resource sixelScrolling)
                     When enabled, sixel graphics are positioned at the current
                     text cursor location, scroll the image vertically if larger
                     than the screen, and leave the text cursor at the start of
                     the next complete line after the image when returning to
                     text mode (this is the default).  When disabled, sixel
                     graphics are positioned at the upper left of the screen,
                     are cropped to fit the screen, and do not affect the text
                     cursor location.  This corresponds to the sixelScrolling
                     resource.  There is no corresponding command-line option.

              Private Color Registers (resource privateColorRegisters)
                     If xterm is configured to support ReGIS graphics, this
                     controls whether a private color palette can be used.

                     When enabled, each graphic image uses a separate set of
                     color registers, so that it essentially has a private
                     palette (this is the default).  If it is not set, all
                     graphics images share a common set of registers which is
                     how sixel and ReGIS graphics worked on actual hardware.
                     The default is likely a more useful mode on modern
                     TrueColor hardware.

                     This corresponds to the privateColorRegisters resource.
                     There is no corresponding command-line option.

       VTxxx Commands:

              Do Soft Reset (resource softreset)
                     Reset scroll regions.  This can be convenient when some
                     program has left the scroll regions set incorrectly (often
                     a problem when using VMS or TOPS-20).  This corresponds to
                     the VT220 DECSTR control sequence.

              Do Full Reset (resource hardreset)
                     The full reset entry will clear the screen, reset tabs to
                     every eight columns, and reset the terminal modes (such as
                     wrap and smooth scroll) to their initial states just after
                     xterm has finished processing the command line options.
                     This corresponds to the VT102 RIS control sequence, with a
                     few obvious differences.  For example, your session is not
                     disconnected as a real VT102 would do.

              Reset and Clear Saved Lines (resource clearsavedlines)
                     Perform a full reset, and also clear the saved lines.

       Commands for setting the current screen:

              Show Tek Window (resource tekshow)
                     When enabled, pops the Tektronix 4014 window up (makes it
                     visible).  When disabled, hides the Tektronix 4014 window.

              Switch to Tek Mode (resource tekmode)
                     When enabled, pops the Tektronix 4014 window up if it is
                     not already visible, and switches the input stream to that
                     window.  When disabled, hides the Tektronix 4014 window and
                     switches input back to the VTxxx window.

              Hide VT Window (resource vthide)
                     When enabled, hides the VTxxx window, shows the Tektronix
                     4014 window if it was not already visible and switches the
                     input stream to that window.  When disabled, shows the
                     VTxxx window, and switches the input stream to that window.

              Show Alternate Screen (resource altscreen)
                     When enabled, shows the alternate screen.  When disabled,
                     shows the normal screen.  Note that the normal screen may
                     have saved lines; the alternate screen does not.

   VT Fonts
       The xterm fontMenu pops up when the “control” key and pointer button
       three are pressed in a window.  It sets the font used in the VTxxx
       window, or modifies the way the font is specified or displayed.  There
       are several sections.

       The first section allows you to select the font from a set of
       alternatives:

              Default (resource fontdefault)
                     Set the font to the default, i.e., that given by the
                     *VT100.font resource.

              Unreadable (resource font1)
                     Set the font to that given by the *VT100.font1 resource.

              Tiny (resource font2)
                     Set the font to that given by the *VT100.font2 resource.

              Small (resource font3)
                     Set the font to that given by the *VT100.font3 resource.

              Medium (resource font4)
                     Set the font to that given by the *VT100.font4 resource.

              Large (resource font5)
                     Set the font to that given by the *VT100.font5 resource.

              Huge (resource font6)
                     Set the font to that given by the *VT100.font6 resource.

              Enormous (resource font7)
                     Set the font to that given by the *VT100.font7 resource.

              Escape Sequence (resource fontescape)
                     This allows you to set the font last specified by the Set
                     Font escape sequence (see Xterm Control Sequences).

              Selection (resource fontsel)
                     This allows you to set the font specified the current
                     selection as a font name (if the PRIMARY selection is
                     owned).

       The second section allows you to modify the way it is displayed:

              Bold Fonts (resource allow-bold-fonts)
                     This is normally checked (enabled).  When unchecked, xterm
                     will not use bold fonts.  The setting corresponds to the
                     allowBoldFonts resource.

              Line-Drawing Characters (resource font-linedrawing)
                     When set, tells xterm to draw its own line-drawing
                     characters.  Otherwise it relies on the font containing
                     these.  Compare to the forceBoxChars resource.

              Packed Font (resource font-packed)
                     When set, tells xterm to use the minimum glyph-width from a
                     font when displaying characters.  Use the maximum width
                     (unchecked) to help display proportional fonts.  Compare to
                     the forcePackedFont resource.

              Doublesized Characters (resource font-doublesize)
                     When set, xterm may ask the font server to produce scaled
                     versions of the normal font, for VT102 double-size
                     characters.

       The third section allows you to modify the way it is specified:

              TrueType Fonts (resource render-font)
                     If the renderFont and corresponding resources were set,
                     this is a further control whether xterm will actually use
                     the Xft library calls to obtain a font.

              UTF-8 Encoding (resource utf8-mode)
                     This controls whether xterm uses UTF-8 encoding of
                     input/output.  It is useful for temporarily switching xterm
                     to display text from an application which does not follow
                     the locale settings.  It corresponds to the utf8 resource.

              UTF-8 Fonts (resource utf8-fonts)
                     This controls whether xterm uses UTF-8 fonts for display.
                     It is useful for temporarily switching xterm to display
                     text from an application which does not follow the locale
                     settings.  It combines the utf8 and utf8Fonts resources,
                     subject to the locale resource.

              UTF-8 Titles (resource utf8-title)
                     This controls whether xterm accepts UTF-8 encoding for
                     title control sequences.  It corresponds to the utf8Fonts
                     resource.

                     Initially the checkmark is set according to both the utf8
                     and utf8Fonts resource values.  If the latter is set to
                     “always”, the checkmark is disabled.  Likewise, if there
                     are no fonts given in the utf8Fonts subresources, then the
                     checkmark also is disabled.

                     The standard XTerm app-defaults file defines both sets of
                     fonts, while the UXTerm app-defaults file defines only one
                     set.  Assuming the standard app-defaults files, this
                     command will launch xterm able to switch between UTF-8 and
                     ISO-8859-1 encoded fonts:

                         uxterm -class XTerm

       The fourth section allows you to enable or disable special operations
       which can be controlled by writing escape sequences to the terminal.
       These are disabled if the SendEvents feature is enabled:

              Allow Color Ops (resource allow-font-ops)
                     This corresponds to the allowColorOps resource.  Enable or
                     disable control sequences that set/query the colors.

              Allow Font Ops (resource allow-font-ops)
                     This corresponds to the allowFontOps resource.  Enable or
                     disable control sequences that set/query the font.

              Allow Mouse Ops (resource allow-mouse-ops)
                     Enable or disable control sequences that cause the terminal
                     to send escape sequences on pointer-clicks and movement.
                     This corresponds to the allowMouseOps resource.

              Allow Tcap Ops (resource allow-tcap-ops)
                     Enable or disable control sequences that query the
                     terminal's notion of its function-key strings, as termcap
                     or terminfo capabilities.  This corresponds to the
                     allowTcapOps resource.

              Allow Title Ops (resource allow-title-ops)
                     Enable or disable control sequences that modify the window
                     title or icon name.  This corresponds to the allowTitleOps
                     resource.

              Allow Window Ops (resource allow-window-ops)
                     Enable or disable extended window control sequences (as
                     used in dtterm).  This corresponds to the allowWindowOps
                     resource.

   Tek Options
       The xterm tekMenu sets various modes in the Tektronix emulation, and is
       popped up when the “control” key and pointer button two are pressed in
       the Tektronix window.  The current font size is checked in the modes
       section of the menu.

              Large Characters (resource tektextlarge)

              #2 Size Characters (resource tektext2)

              #3 Size Characters (resource tektext3)

              Small Characters (resource tektextsmall)

       Commands:

              PAGE (resource tekpage)
                     Simulates the Tektronix “PAGE” button by

                     •   clearing the window,

                     •   cancelling the graphics input-mode, and

                     •   moving the cursor to the home position.

              RESET (resource tekreset)
                     Unlike the similarly-named Tektronix “RESET” button, this
                     does everything that PAGE does as well as resetting the
                     line-type and font-size to their default values.

              COPY (resource tekcopy)
                     Simulates the Tektronix “COPY” button (which makes a hard-
                     copy of the screen) by writing the information to a text
                     file.

       Windows:

              Show VT Window (resource vtshow)

              Switch to VT Mode (resource vtmode)

              Hide Tek Window (resource tekhide)

SECURITY
       X environments differ in their security consciousness.

       •   Most servers, run under xdm, are capable of using a “magic cookie”
           authorization scheme that can provide a reasonable level of security
           for many people.  If your server is only using a host-based mechanism
           to control access to the server (see xhost(1)), then if you enable
           access for a host and other users are also permitted to run clients
           on that same host, it is possible that someone can run an application
           which uses the basic services of the X protocol to snoop on your
           activities, potentially capturing a transcript of everything you type
           at the keyboard.

       •   Any process which has access to your X display can manipulate it in
           ways that you might not anticipate, even redirecting your keyboard to
           itself and sending events to your application's windows.  This is
           true even with the “magic cookie” authorization scheme.  While the
           allowSendEvents provides some protection against rogue applications
           tampering with your programs, guarding against a snooper is harder.

       •   The X input extension for instance allows an application to bypass
           all of the other (limited) authorization and security features,
           including the GrabKeyboard protocol.

       •   The possibility of an application spying on your keystrokes is of
           particular concern when you want to type in a password or other
           sensitive data.  The best solution to this problem is to use a better
           authorization mechanism than is provided by X.

       Subject to all of these caveats, a simple mechanism exists for protecting
       keyboard input in xterm.

       The xterm menu (see MENUS above) contains a Secure Keyboard entry which,
       when enabled, attempts to ensure that all keyboard input is directed only
       to xterm (using the GrabKeyboard protocol request).  When an application
       prompts you for a password (or other sensitive data), you can enable
       Secure Keyboard using the menu, type in the data, and then disable Secure
       Keyboard using the menu again.

       •   This ensures that you know which window is accepting your keystrokes.

       •   It cannot ensure that there are no processes which have access to
           your X display that might be observing the keystrokes as well.

       Only one X client at a time can grab the keyboard, so when you attempt to
       enable Secure Keyboard it may fail.  In this case, the bell will sound.
       If the Secure Keyboard succeeds, the foreground and background colors
       will be exchanged (as if you selected the Enable Reverse Video entry in
       the Modes menu); they will be exchanged again when you exit secure mode.
       If the colors do not switch, then you should be very suspicious that you
       are being spoofed.  If the application you are running displays a prompt
       before asking for the password, it is safest to enter secure mode before
       the prompt gets displayed, and to make sure that the prompt gets
       displayed correctly (in the new colors), to minimize the probability of
       spoofing.  You can also bring up the menu again and make sure that a
       check mark appears next to the entry.

       Secure Keyboard mode will be disabled automatically if your xterm window
       becomes iconified (or otherwise unmapped), or if you start up a
       reparenting window manager (that places a title bar or other decoration
       around the window) while in Secure Keyboard mode.  (This is a feature of
       the X protocol not easily overcome.)  When this happens, the foreground
       and background colors will be switched back and the bell will sound in
       warning.

CHARACTER CLASSES
       Clicking the left pointer button twice in rapid succession (double-
       clicking) causes all characters of the same class (e.g., letters, white
       space, punctuation) to be selected as a “word”.  Since different people
       have different preferences for what should be selected (for example,
       should filenames be selected as a whole or only the separate subnames),
       the default mapping can be overridden through the use of the charClass
       (class CharClass) resource.

       This resource is a series of comma-separated range:value pairs.

       •   The range is either a single number or low-high in the range of 0 to
           65535, corresponding to the code for the character or characters to
           be set.

       •   The value is arbitrary.  For example, the default table uses the
           character number of the first character occurring in the set.  When
           not in UTF-8 mode, only the first 256 entries of this table will be
           used.

       The default table starts as follows -

           static int charClass[256] = {
           /* NUL  SOH  STX  ETX  EOT  ENQ  ACK  BEL */
               32,   1,   1,   1,   1,   1,   1,   1,
           /*  BS   HT   NL   VT   NP   CR   SO   SI */
                1,  32,   1,   1,   1,   1,   1,   1,
           /* DLE  DC1  DC2  DC3  DC4  NAK  SYN  ETB */
                1,   1,   1,   1,   1,   1,   1,   1,
           /* CAN   EM  SUB  ESC   FS   GS   RS   US */
                1,   1,   1,   1,   1,   1,   1,   1,
           /*  SP    !    "    #    $    %    &    ' */
               32,  33,  34,  35,  36,  37,  38,  39,
           /*   (    )    *    +    ,    -    .    / */
               40,  41,  42,  43,  44,  45,  46,  47,
           /*   0    1    2    3    4    5    6    7 */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*   8    9    :    ;    <    =    >    ? */
               48,  48,  58,  59,  60,  61,  62,  63,
           /*   @    A    B    C    D    E    F    G */
               64,  48,  48,  48,  48,  48,  48,  48,
           /*   H    I    J    K    L    M    N    O */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*   P    Q    R    S    T    U    V    W */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*   X    Y    Z    [    \    ]    ^    _ */
               48,  48,  48,  91,  92,  93,  94,  48,
           /*   `    a    b    c    d    e    f    g */
               96,  48,  48,  48,  48,  48,  48,  48,
           /*   h    i    j    k    l    m    n    o */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*   p    q    r    s    t    u    v    w */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*   x    y    z    {    |    }    ~  DEL */
               48,  48,  48, 123, 124, 125, 126,   1,
           /* x80  x81  x82  x83  IND  NEL  SSA  ESA */
                1,   1,   1,   1,   1,   1,   1,   1,
           /* HTS  HTJ  VTS  PLD  PLU   RI  SS2  SS3 */
                1,   1,   1,   1,   1,   1,   1,   1,
           /* DCS  PU1  PU2  STS  CCH   MW  SPA  EPA */
                1,   1,   1,   1,   1,   1,   1,   1,
           /* x98  x99  x9A  CSI   ST  OSC   PM  APC */
                1,   1,   1,   1,   1,   1,   1,   1,
           /*   -    i   c/    L   ox   Y-    |   So */
              160, 161, 162, 163, 164, 165, 166, 167,
           /*  ..   c0   ip   <<    _        R0    - */
              168, 169, 170, 171, 172, 173, 174, 175,
           /*   o   +-    2    3    '    u   q|    . */
              176, 177, 178, 179, 180, 181, 182, 183,
           /*   ,    1    2   >>  1/4  1/2  3/4    ? */
              184, 185, 186, 187, 188, 189, 190, 191,
           /*  A`   A'   A^   A~   A:   Ao   AE   C, */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*  E`   E'   E^   E:   I`   I'   I^   I: */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*  D-   N~   O`   O'   O^   O~   O:    X */
               48,  48,  48,  48,  48,  48,  48, 215,
           /*  O/   U`   U'   U^   U:   Y'    P    B */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*  a`   a'   a^   a~   a:   ao   ae   c, */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*  e`   e'   e^   e:   i`   i'   i^   i: */
               48,  48,  48,  48,  48,  48,  48,  48,
           /*   d   n~   o`   o'   o^   o~   o:   -: */
               48,  48,  48,  48,  48,  48,  48, 247,
           /*  o/   u`   u'   u^   u:   y'    P   y: */
               48,  48,  48,  48,  48,  48,  48,  48};

              For example, the string “33:48,37:48,45-47:48,38:48” indicates
              that the exclamation mark, percent sign, dash, period, slash, and
              ampersand characters should be treated the same way as characters
              and numbers.  This is useful for cutting and pasting electronic
              mailing addresses and filenames.

KEY BINDINGS
       It is possible to rebind keys (or sequences of keys) to arbitrary strings
       for input, by changing the translations resources for the vt100 or
       tek4014 widgets.  Changing the translations resource for events other
       than key and button events is not expected, and will cause unpredictable
       behavior.

   Actions
       The following actions are provided for use within the vt100 or tek4014
       translations resources:

       allow-bold-fonts(on/off/toggle)
               This action sets, unsets or toggles the allowBoldFonts resource
               and is also invoked by the allow-bold-fonts entry in fontMenu.

       allow-color-ops(on/off/toggle)
               This action sets, unsets or toggles the allowColorOps resource
               and is also invoked by the allow-color-ops entry in fontMenu.

       allow-font-ops(on/off/toggle)
               This action sets, unsets or toggles the allowFontOps resource and
               is also invoked by the allow-font-ops entry in fontMenu.

       allow-mouse-ops(on/off/toggle)
               This action sets, unsets or toggles the allowMousepOps resource
               and is also invoked by the allow-mouse-ops entry in fontMenu.

       allow-send-events(on/off/toggle)
               This action sets, unsets or toggles the allowSendEvents resource
               and is also invoked by the allowsends entry in mainMenu.

       allow-tcap-ops(on/off/toggle)
               This action sets, unsets or toggles the allowTcapOps resource and
               is also invoked by the allow-tcap-ops entry in fontMenu.

       allow-title-ops(on/off/toggle)
               This action sets, unsets or toggles the allowTitleOps resource
               and is also invoked by the allow-title-ops entry in fontMenu.

       allow-window-ops(on/off/toggle)
               This action sets, unsets or toggles the allowWindowOps resource
               and is also invoked by the allow-window-ops entry in fontMenu.

       alt-sends-escape()
               This action toggles the state of the altSendsEscape resource.

       bell([percent])
               This action rings the keyboard bell at the specified percentage
               above or below the base volume.

       clear-saved-lines()
               This action does hard-reset() and also clears the history of
               lines saved off the top of the screen.  It is also invoked from
               the clearsavedlines entry in vtMenu.  The effect is identical to
               a hardware reset (RIS) control sequence.

       copy-selection(destname [, ...])
               This action puts the currently selected text into all of the
               selections or cutbuffers specified by destname.  Unlike
               select-end, it does not send a mouse position or otherwise modify
               the internal selection state.

       create-menu(m/v/f/t)
               This action creates one of the menus used by xterm, if it has not
               been previously created.  The parameter values are the menu
               names: mainMenu, vtMenu, fontMenu, tekMenu, respectively.

       dabbrev-expand()
               Expands the word before cursor by searching in the preceding text
               on the screen and in the scrollback buffer for words starting
               with that abbreviation.  Repeating dabbrev-expand() several times
               in sequence searches for an alternative expansion by looking
               farther back.  Lack of more matches is signaled by a bell.
               Attempts to expand an empty word (i.e., when cursor is preceded
               by a space) yield successively all previous words.  Consecutive
               identical expansions are ignored.  The word here is defined as a
               sequence of non-whitespace characters.  This feature partially
               emulates the behavior of “dynamic abbreviation” expansion in
               Emacs (bound there to M-/).  Here is a resource setting for xterm
               which will do the same thing:

                   *VT100*translations:    #override \n\
                           Meta <KeyPress> /:dabbrev-expand()

       deiconify()
               Changes the window state back to normal, if it was iconified.

       delete-is-del()
               This action toggles the state of the deleteIsDEL resource.

       dired-button()
               Handles a button event (other than press and release) by echoing
               the event's position (i.e., character line and column) in the
               following format:

                   ^X ESC G <line+“ ”> <col+“ ”>

       dump-html()
               Invokes the XHTML Screen Dump feature.

       dump-svg()
               Invokes the SVG Screen Dump feature.

       exec-formatted(format, sourcename [, ...])
               Execute an external command, using the current selection for part
               of the command's parameters.  The first parameter, format gives
               the basic command.  Succeeding parameters specify the selection
               source as in insert-selection.

               The format parameter allows these substitutions:

               %%   inserts a "%".

               %P   the screen-position at the beginning of the highlighted
                    region, as a semicolon-separated pair of integers using the
                    values that the CUP control sequence would use.

               %p   the screen-position after the beginning of the highlighted
                    region, using the same convention as “%P”.

               %S   the length of the string that “%s” would insert.

               %s   the content of the selection, unmodified.

               %T   the length of the string that “%t” would insert.

               %t   the selection, trimmed of leading/trailing whitespace.
                    Embedded spaces (and newlines) are copied as is.

               %R   the length of the string that “%r” would insert.

               %r   the selection, trimmed of trailing whitespace.

               %V   the video attributes at the beginning of the highlighted
                    region, as a semicolon-separated list of integers using the
                    values that the SGR control sequence would use.

               %v   the video attributes after the end of the highlighted
                    region, using the same convention as “%V”.

               After constructing the command-string, xterm forks a subprocess
               and executes the command, which completes independently of xterm.

               For example, this translation would invoke a new xterm process to
               view a file whose name is selected while holding the shift key
               down.  The new process is started when the mouse button is
               released:

                   *VT100*translations: #override Shift \
                       <Btn1Up>:exec-formatted("xterm -e view '%t'", SELECT)

       exec-selectable(format, onClicks)
               Execute an external command, using data copied from the screen
               for part of the command's parameters.  The first parameter,
               format gives the basic command as in exec-formatted.  The second
               parameter specifies the method for copying the data as in the
               on2Clicks resource.

       fullscreen(on/off/toggle)
               This action sets, unsets or toggles the fullscreen resource.

       iconify()
               Iconifies the window.

       hard-reset()
               This action resets the scrolling region, tabs, window size, and
               cursor keys and clears the screen.  It is also invoked from the
               hardreset entry in vtMenu.

       ignore()
               This action ignores the event but checks for special pointer
               position escape sequences.

       insert()
               This action inserts the character or string associated with the
               key that was pressed.

       insert-eight-bit()
               This action inserts an eight-bit (Meta) version of the character
               or string associated with the key that was pressed.  Only single-
               byte values are treated specially.  The exact action depends on
               the value of the altSendsEscape and the metaSendsEscape and the
               eightBitInput resources.  The metaSendsEscape resource is tested
               first.  See the eightBitInput resource for a full discussion.

               The term “eight-bit” is misleading: xterm checks if the key is in
               the range 128 to 255 (the eighth bit is set).  If the value is in
               that range, depending on the resource values, xterm may then do
               one of the following:

               •   add 128 to the value, setting its eighth bit,

               •   send an ESC byte before the key, or

               •   send the key unaltered.

       insert-formatted(format, sourcename [, ...])
               Insert the current selection or data related to it, formatted.
               The first parameter, format gives the template for the data as in
               exec-formatted.  Succeeding parameters specify the selection
               source as in insert-selection.

       insert-selectable(format, onClicks)
               Insert data copied from the screen, formatted.  The first
               parameter, format gives the template for the data as in
               exec-formatted.  The second parameter specifies the method for
               copying the data as in the on2Clicks resource.

       insert-selection(sourcename [, ...])
               This action inserts the string found in the selection or
               cutbuffer indicated by sourcename.  Sources are checked in the
               order given (case is significant) until one is found.  Commonly-
               used selections include: PRIMARY, SECONDARY, and CLIPBOARD.  Cut
               buffers are typically named CUT_BUFFER0 through CUT_BUFFER7.

       insert-seven-bit()
               This action is a synonym for insert().  The term “seven-bit” is
               misleading: it only implies that xterm does not try to add 128 to
               the key's value as in insert-eight-bit().

       interpret(control-sequence)
               Interpret the given control sequence locally, i.e., without
               passing it to the host.  This works by inserting the control
               sequence at the front of the input buffer.  Use “\” to escape
               octal digits in the string.  Xt does not allow you to put a null
               character (i.e., “\000”) in the string.

       keymap(name)
               This action dynamically defines a new translation table whose
               resource name is name with the suffix “Keymap” (i.e., nameKeymap,
               where case is significant).  The name None restores the original
               translation table.

       larger-vt-font()
               Set the font to the next larger one, based on the font
               dimensions.  See also set-vt-font().

       load-vt-fonts(name[,class])
               Load fontnames from the given subresource name and class.  That
               is, load the “*VT100.name.font”, resource as “*VT100.font” etc.
               If no name is given, the original set of fontnames is restored.

               Unlike set-vt-font(), this does not affect the escape- and
               select-fonts, since those are not based on resource values.  It
               does affect the fonts loosely organized under the “Default” menu
               entry, including font, boldFont, wideFont and wideBoldFont.

       maximize()
               Resizes the window to fill the screen.

       meta-sends-escape()
               This action toggles the state of the metaSendsEscape resource.

       pointer-button()
               Use this action as a fall-back to handle button press- and
               release-events for the mouse control sequence protocol when the
               selection-related translations are suppressed with the
               omitTranslation resource.

       pointer-motion()
               Use this action as a fall-back to handle motion-events for the
               mouse control sequence protocol when the selection-related
               translations are suppressed with the omitTranslation resource.

       popup-menu(menuname)
               This action displays the specified popup menu.  Valid names (case
               is significant) include:  mainMenu, vtMenu, fontMenu, and
               tekMenu.

       print(printer-flags)
               This action prints the window.  It is also invoked by the print
               entry in mainMenu.

               The action accepts optional parameters, which temporarily
               override resource settings.  The parameter values are matched
               ignoring case:

               noFormFeed
                    no form feed will be sent at the end of the last line
                    printed (i.e., printerFormFeed is “false”).

               FormFeed
                    a form feed will be sent at the end of the last line printed
                    (i.e., printerFormFeed is “true”).

               noNewLine
                    no newline will be sent at the end of the last line printed,
                    and wrapped lines will be combined into long lines (i.e.,
                    printerNewLine is “false”).

               NewLine
                    a newline will be sent at the end of the last line printed,
                    and each line will be limited (by adding a newline) to the
                    screen width (i.e., printerNewLine is “true”).

               noAttrs
                    the page is printed without attributes (i.e.,
                    printAttributes is “0”).

               monoAttrs
                    the page is printed with monochrome (vt220) attributes
                    (i.e., printAttributes is “1”).

               colorAttrs
                    the page is printed with ANSI color attributes (i.e.,
                    printAttributes is “2”).

       print-everything(printer-flags)
               This action sends the entire text history, in addition to the
               text currently visible, to the program given in the
               printerCommand resource.  It allows the same optional parameters
               as the print action.  With a suitable printer command, the action
               can be used to load the text history in an editor.

       print-immediate()
               Sends the text of the current window directly to a file, as
               specified by the printFileImmediate, printModeImmediate and
               printOptsImmediate resources.

       print-on-error()
               Toggles a flag telling xterm that if it exits with an X error, to
               send the text of the current window directly to a file, as
               specified by the printFileOnXError, printModeOnXError and
               printOptsOnXError resources.

       print-redir()
               This action toggles the printerControlMode between 0 and 2.  The
               corresponding popup menu entry is useful for switching the
               printer off if you happen to change your mind after deciding to
               print random binary files on the terminal.

       quit()
               This action sends a SIGHUP to the subprogram and exits.  It is
               also invoked by the quit entry in mainMenu.

       readline-button()
               Supports the optional readline feature by echoing repeated cursor
               forward or backward control sequences on button release event, to
               request that the host application update its notion of the
               cursor's position to match the button event.

       redraw()
               This action redraws the window.  It is also invoked by the redraw
               entry in mainMenu.

       restore()
               Restores the window to the size before it was last maximized.

       scroll-back(count [,units [,mouse] ])
               This action scrolls the text window backward so that text that
               had previously scrolled off the top of the screen is now visible.

               The count argument indicates the number of units (which may be
               page, halfpage, pixel, or line) by which to scroll.  If no count
               parameter is given, xterm uses the number of lines given by the
               scrollLines resource.

               An adjustment can be specified for the page or halfpage units by
               appending a “+” or “-” sign followed by a number, e.g., page-2 to
               specify 2 lines less than a page.

               If the second parameter is omitted “lines” is used.

               If the third parameter mouse is given, the action is ignored when
               mouse reporting is enabled.

       scroll-forw(count [,units [,mouse] ])
               This action is similar to scroll-back except that it scrolls in
               the other direction.

       secure()
               This action toggles the Secure Keyboard mode (see SECURITY), and
               is invoked from the securekbd entry in mainMenu.

       scroll-lock(on/off/toggle)
               This action sets, unsets or toggles internal state which tells
               xterm whether Scroll Lock is active, subject to the
               allowScrollLock resource.

       scroll-to(count)
               Scroll to the given line relative to the beginning of the saved-
               lines.  For instance, “scroll-to(0)” would scroll to the
               beginning.  Two special nonnumeric parameters are recognized:

               scroll-to(begin)
                       Scroll to the beginning of the saved lines.

               scroll-to(end)
                       Scroll to the end of the saved lines, i.e., to the
                       currently active page.

       select-cursor-end(destname [, ...])
               This action is similar to select-end except that it should be
               used with select-cursor-start.

       select-cursor-extend()
               This action is similar to select-extend except that it should be
               used with select-cursor-start.

       select-cursor-start()
               This action is similar to select-start except that it begins the
               selection at the current text cursor position.

       select-end(destname [, ...])
               This action puts the currently selected text into all of the
               selections or cutbuffers specified by destname.  It also sends a
               mouse position and updates the internal selection state to
               reflect the end of the selection process.

       select-extend()
               This action tracks the pointer and extends the selection.  It
               should only be bound to Motion events.

       select-set()
               This action stores text that corresponds to the current
               selection, without affecting the selection mode.

       select-start()
               This action begins text selection at the current pointer
               location.  See the section on POINTER USAGE for information on
               making selections.

       send-signal(signame)
               This action sends the signal named by signame to the xterm
               subprocess (the shell or program specified with the -e command
               line option).  It is also invoked by the suspend, continue,
               interrupt, hangup, terminate, and kill entries in mainMenu.
               Allowable signal names are (case is not significant): tstp (if
               supported by the operating system), suspend (same as tstp), cont
               (if supported by the operating system), int, hup, term, quit,
               alrm, alarm (same as alrm) and kill.

       set-8-bit-control(on/off/toggle)
               This action sets, unsets or toggles the eightBitControl resource.
               It is also invoked from the 8-bit-control entry in vtMenu.

       set-allow132(on/off/toggle)
               This action sets, unsets or toggles the c132 resource.  It is
               also invoked from the allow132 entry in vtMenu.

       set-altscreen(on/off/toggle)
               This action sets, unsets or toggles between the alternate and
               current screens.

       set-appcursor(on/off/toggle)
               This action sets, unsets or toggles the handling Application
               Cursor Key mode and is also invoked by the appcursor entry in
               vtMenu.

       set-appkeypad(on/off/toggle)
               This action sets, unsets or toggles the handling of Application
               Keypad mode and is also invoked by the appkeypad entry in vtMenu.

       set-autolinefeed(on/off/toggle)
               This action sets, unsets or toggles automatic insertion of line
               feeds.  It is also invoked by the autolinefeed entry in vtMenu.

       set-autowrap(on/off/toggle)
               This action sets, unsets or toggles automatic wrapping of long
               lines.  It is also invoked by the autowrap entry in vtMenu.

       set-backarrow(on/off/toggle)
               This action sets, unsets or toggles the backarrowKey resource.
               It is also invoked from the backarrow key entry in vtMenu.

       set-bellIsUrgent(on/off/toggle)
               This action sets, unsets or toggles the bellIsUrgent resource.
               It is also invoked by the bellIsUrgent entry in vtMenu.

       set-cursorblink(on/off/toggle)
               This action sets, unsets or toggles the cursorBlink resource.  It
               is also invoked from the cursorblink entry in vtMenu.

       set-cursesemul(on/off/toggle)
               This action sets, unsets or toggles the curses resource.  It is
               also invoked from the cursesemul entry in vtMenu.

       set-font-doublesize(on/off/toggle)
               This action sets, unsets or toggles the fontDoublesize resource.
               It is also invoked by the font-doublesize entry in fontMenu.

       set-hp-function-keys(on/off/toggle)
               This action sets, unsets or toggles the hpFunctionKeys resource.
               It is also invoked by the hpFunctionKeys entry in mainMenu.

       set-jumpscroll(on/off/toggle)
               This action sets, unsets or toggles the jumpscroll resource.  It
               is also invoked by the jumpscroll entry in vtMenu.

       set-font-linedrawing(on/off/toggle)
               This action sets, unsets or toggles the xterm's state regarding
               whether the current font has line-drawing characters and whether
               it should draw them directly.  It is also invoked by the
               font-linedrawing entry in fontMenu.

       set-font-packed(on/off/toggle)
               This action sets, unsets or toggles the forcePackedFont resource
               which controls use of the font's minimum or maximum glyph width.
               It is also invoked by the font-packed entry in fontMenu.

       set-keep-clipboard(on/off/toggle)
               This action sets, unsets or toggles the keepClipboard resource.

       set-keep-selection(on/off/toggle)
               This action sets, unsets or toggles the keepSelection resource.
               It is also invoked by the keepSelection entry in vtMenu.

       set-logging(on/off/toggle)
               This action sets, unsets or toggles the state of the logging
               option.

       set-old-function-keys(on/off/toggle)
               This action sets, unsets or toggles the state of legacy function
               keys.  It is also invoked by the oldFunctionKeys entry in
               mainMenu.

       set-marginbell(on/off/toggle)
               This action sets, unsets or toggles the marginBell resource.

       set-num-lock(on/off/toggle)
               This action toggles the state of the numLock resource.

       set-pop-on-bell(on/off/toggle)
               This action sets, unsets or toggles the popOnBell resource.  It
               is also invoked by the poponbell entry in vtMenu.

       set-private-colors(on/off/toggle)
               This action sets, unsets or toggles the privateColorRegisters
               resource.

       set-render-font(on/off/toggle)
               This action sets, unsets or toggles the renderFont resource.  It
               is also invoked by the render-font entry in fontMenu.

       set-reverse-video(on/off/toggle)
               This action sets, unsets or toggles the reverseVideo resource.
               It is also invoked by the reversevideo entry in vtMenu.

       set-reversewrap(on/off/toggle)
               This action sets, unsets or toggles the reverseWrap resource.  It
               is also invoked by the reversewrap entry in vtMenu.

       set-scroll-on-key(on/off/toggle)
               This action sets, unsets or toggles the scrollKey resource.  It
               is also invoked from the scrollkey entry in vtMenu.

       set-scroll-on-tty-output(on/off/toggle)
               This action sets, unsets or toggles the scrollTtyOutput resource.
               It is also invoked from the scrollttyoutput entry in vtMenu.

       set-scrollbar(on/off/toggle)
               This action sets, unsets or toggles the scrollbar resource.  It
               is also invoked by the scrollbar entry in vtMenu.

       set-sco-function-keys(on/off/toggle)
               This action sets, unsets or toggles the scoFunctionKeys resource.
               It is also invoked by the scoFunctionKeys entry in mainMenu.

       set-select(on/off/toggle)
               This action sets, unsets or toggles the selectToClipboard
               resource.  It is also invoked by the selectToClipboard entry in
               vtMenu.

       set-sixel-scrolling(on/off/toggle)
               This action toggles between inline (sixel scrolling) and absolute
               positioning.  It can also be controlled via DEC private mode 80
               (DECSDM) or from the sixelScrolling entry in the btMenu.

       set-sun-function-keys(on/off/toggle)
               This action sets, unsets or toggles the sunFunctionKeys resource.
               It is also invoked by the sunFunctionKeys entry in mainMenu.

       set-sun-keyboard(on/off/toggle)
               This action sets, unsets or toggles the sunKeyboard resource.  It
               is also invoked by the sunKeyboard entry in mainMenu.

       set-tek-text(large/2/3/small)
               This action sets the font used in the Tektronix window to the
               value of the selected resource according to the argument.  The
               argument can be either a keyword or single-letter alias, as shown
               in parentheses:

               large (l)
                    Use resource fontLarge, same as menu entry tektextlarge.

               two (2)
                    Use resource font2, same as menu entry tektext2.

               three (3)
                    Use resource font3, same as menu entry tektext3.

               small (s)
                    Use resource fontSmall, same as menu entry tektextsmall.

       set-terminal-type(type)
               This action directs output to either the vt or tek windows,
               according to the type string.  It is also invoked by the tekmode
               entry in vtMenu and the vtmode entry in tekMenu.

       set-titeInhibit(on/off/toggle)
               This action sets, unsets or toggles the titeInhibit resource,
               which controls switching between the alternate and current
               screens.

       set-toolbar(on/off/toggle)
               This action sets, unsets or toggles the toolbar feature.  It is
               also invoked by the toolbar entry in mainMenu.

       set-utf8-fonts(on/off/toggle)
               This action sets, unsets or toggles the utf8Fonts resource.  It
               is also invoked by the utf8-fonts entry in fontMenu.

       set-utf8-mode(on/off/toggle)
               This action sets, unsets or toggles the utf8 resource.  It is
               also invoked by the utf8-mode entry in fontMenu.

       set-utf8-title(on/off/toggle)
               This action sets, unsets or toggles the utf8Title resource.  It
               is also invoked by the utf8-title entry in fontMenu.

       set-visibility(vt/tek,on/off/toggle)
               This action sets, unsets or toggles whether or not the vt or tek
               windows are visible.  It is also invoked from the tekshow and
               vthide entries in vtMenu and the vtshow and tekhide entries in
               tekMenu.

       set-visual-bell(on/off/toggle)
               This action sets, unsets or toggles the visualBell resource.  It
               is also invoked by the visualbell entry in vtMenu.

       set-vt-font(d/1/2/3/4/5/6/7/e/s [,normalfont [, boldfont]])
               This action sets the font or fonts currently being used in the
               VTxxx window.  The first argument is a single character that
               specifies the font to be used:

               d or D indicate the default font (the font initially used when
                      xterm was started),

               1 through 7 indicate the fonts specified by the font1 through
                      font7 resources,

               e or E indicate the normal and bold fonts that have been set
                      through escape codes (or specified as the second and third
                      action arguments, respectively), and

               s or S indicate the font selection (as made by programs such as
                      xfontsel(1)) indicated by the second action argument.

               If xterm is configured to support wide characters, an additional
               two optional parameters are recognized for the e argument: wide
               font and wide bold font.

       smaller-vt-font()
               Set the font to the next smaller one, based on the font
               dimensions.  See also set-vt-font().

       soft-reset()
               This action resets the scrolling region.  It is also invoked from
               the softreset entry in vtMenu.  The effect is identical to a soft
               reset (DECSTR) control sequence.

       spawn-new-terminal(params)
               Spawn a new xterm process.  This is available on systems which
               have a modern version of the process filesystem, e.g., “/proc”,
               which xterm can read.

               Use the “cwd” process entry, e.g., /proc/12345/cwd to obtain the
               working directory of the process which is running in the current
               xterm.

               On systems which have the “exe” process entry, e.g.,
               /proc/12345/exe, use this to obtain the actual executable.
               Otherwise, use the $PATH variable to find xterm.

               If parameters are given in the action, pass them to the new xterm
               process.

       start-extend()
               This action is similar to select-start except that the selection
               is extended to the current pointer location.

       start-cursor-extend()
               This action is similar to select-extend except that the selection
               is extended to the current text cursor position.

       string(string)
               This action inserts the specified text string as if it had been
               typed.  Quotation is necessary if the string contains whitespace
               or non-alphanumeric characters.  If the string argument begins
               with the characters “0x”, it is interpreted as a hex character
               constant.

       tek-copy()
               This action copies the escape codes used to generate the current
               window contents to a file in the current directory beginning with
               the name COPY.  It is also invoked from the tekcopy entry in
               tekMenu.

       tek-page()
               This action clears the Tektronix window.  It is also invoked by
               the tekpage entry in tekMenu.

       tek-reset()
               This action resets the Tektronix window.  It is also invoked by
               the tekreset entry in tekMenu.

       vi-button()
               Handles a button event (other than press and release) by echoing
               a control sequence computed from the event's line number in the
               screen relative to the current line:

                   ESC ^P

               or

                   ESC ^N

               according to whether the event is before, or after the current
               line, respectively.  The ^N (or ^P) is repeated once for each
               line that the event differs from the current line.  The control
               sequence is omitted altogether if the button event is on the
               current line.

       visual-bell()
               This action flashes the window quickly.

       The Tektronix window also has the following action:

       gin-press(l/L/m/M/r/R)
               This action sends the indicated graphics input code.

   Default Key Bindings
       The default bindings in the VTxxx window use the SELECT token, which is
       set by the selectToClipboard resource.  These are for the vt100 widget:

                     Shift <KeyPress> Prior:scroll-back(1,halfpage) \n\
                      Shift <KeyPress> Next:scroll-forw(1,halfpage) \n\
                    Shift <KeyPress> Select:select-cursor-start() \
                                            select-cursor-end(SELECT, CUT_BUFFER0) \n\
                    Shift <KeyPress> Insert:insert-selection(SELECT, CUT_BUFFER0) \n\
                            Alt <Key>Return:fullscreen() \n\
                   <KeyRelease> Scroll_Lock:scroll-lock() \n\
               Shift~Ctrl <KeyPress> KP_Add:larger-vt-font() \n\
               Shift Ctrl <KeyPress> KP_Add:smaller-vt-font() \n\
               Shift <KeyPress> KP_Subtract:smaller-vt-font() \n\
                           ~Meta <KeyPress>:insert-seven-bit() \n\
                            Meta <KeyPress>:insert-eight-bit() \n\
                           !Ctrl <Btn1Down>:popup-menu(mainMenu) \n\
                      !Lock Ctrl <Btn1Down>:popup-menu(mainMenu) \n\
            !Lock Ctrl @Num_Lock <Btn1Down>:popup-menu(mainMenu) \n\
                ! @Num_Lock Ctrl <Btn1Down>:popup-menu(mainMenu) \n\
                           ~Meta <Btn1Down>:select-start() \n\
                         ~Meta <Btn1Motion>:select-extend() \n\
                           !Ctrl <Btn2Down>:popup-menu(vtMenu) \n\
                      !Lock Ctrl <Btn2Down>:popup-menu(vtMenu) \n\
            !Lock Ctrl @Num_Lock <Btn2Down>:popup-menu(vtMenu) \n\
                ! @Num_Lock Ctrl <Btn2Down>:popup-menu(vtMenu) \n\
                     ~Ctrl ~Meta <Btn2Down>:ignore() \n\
                            Meta <Btn2Down>:clear-saved-lines() \n\
                       ~Ctrl ~Meta <Btn2Up>:insert-selection(SELECT, CUT_BUFFER0) \n\
                           !Ctrl <Btn3Down>:popup-menu(fontMenu) \n\
                      !Lock Ctrl <Btn3Down>:popup-menu(fontMenu) \n\
            !Lock Ctrl @Num_Lock <Btn3Down>:popup-menu(fontMenu) \n\
                ! @Num_Lock Ctrl <Btn3Down>:popup-menu(fontMenu) \n\
                     ~Ctrl ~Meta <Btn3Down>:start-extend() \n\
                         ~Meta <Btn3Motion>:select-extend() \n\
                            Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
                       Lock Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
             Lock @Num_Lock Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
                  @Num_Lock Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
                                 <Btn4Down>:scroll-back(5,line,m)     \n\
                            Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
                       Lock Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
             Lock @Num_Lock Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
                  @Num_Lock Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
                                 <Btn5Down>:scroll-forw(5,line,m)     \n\
                                    <BtnUp>:select-end(SELECT, CUT_BUFFER0) \n\
                                <BtnMotion>:pointer-motion() \n\
                                  <BtnDown>:pointer-button() \n\
                                    <BtnUp>:pointer-button() \n\
                                  <BtnDown>:ignore()

       The default bindings in the Tektronix window are analogous but less
       extensive.  These are for the tek4014 widget:

                            ~Meta<KeyPress>: insert-seven-bit() \n\
                             Meta<KeyPress>: insert-eight-bit() \n\
                           !Ctrl <Btn1Down>: popup-menu(mainMenu) \n\
                      !Lock Ctrl <Btn1Down>: popup-menu(mainMenu) \n\
            !Lock Ctrl @Num_Lock <Btn1Down>: popup-menu(mainMenu) \n\
                 !Ctrl @Num_Lock <Btn1Down>: popup-menu(mainMenu) \n\
                           !Ctrl <Btn2Down>: popup-menu(tekMenu) \n\
                      !Lock Ctrl <Btn2Down>: popup-menu(tekMenu) \n\
            !Lock Ctrl @Num_Lock <Btn2Down>: popup-menu(tekMenu) \n\
                 !Ctrl @Num_Lock <Btn2Down>: popup-menu(tekMenu) \n\
                      Shift ~Meta<Btn1Down>: gin-press(L) \n\
                            ~Meta<Btn1Down>: gin-press(l) \n\
                      Shift ~Meta<Btn2Down>: gin-press(M) \n\
                            ~Meta<Btn2Down>: gin-press(m) \n\
                      Shift ~Meta<Btn3Down>: gin-press(R) \n\
                            ~Meta<Btn3Down>: gin-press(r)

   Custom Key Bindings
       You can modify the translations resource by overriding parts of it, or
       merging your resources with it.

       Here is an example which uses shifted select/paste to copy to the
       clipboard, and unshifted select/paste for the primary selection.  In each
       case, a (different) cut buffer is also a target or source of the
       select/paste operation.  It is important to remember however, that cut
       buffers store data in ISO-8859-1 encoding, while selections can store
       data in a variety of formats and encodings.  While xterm owns the
       selection, it highlights it.  When it loses the selection, it removes the
       corresponding highlight.  But you can still paste from the corresponding
       cut buffer.

           *VT100*translations:    #override \n\
              ~Shift~Ctrl<Btn2Up>: insert-selection(PRIMARY, CUT_BUFFER0) \n\
               Shift~Ctrl<Btn2Up>: insert-selection(CLIPBOARD, CUT_BUFFER1) \n\
              ~Shift     <BtnUp> : select-end(PRIMARY, CUT_BUFFER0) \n\
               Shift     <BtnUp> : select-end(CLIPBOARD, CUT_BUFFER1)

       In the example, the class name VT100 is used rather than the widget name.
       These are different; a class name could apply to more than one widget.  A
       leading “*” is used because the widget hierarchy above the vt100 widget
       depends on whether the toolbar support is compiled into xterm.

       Most of the predefined translations are related to the mouse, with a few
       that use some of the special keys on the keyboard.  Applications use
       special keys (function-keys, cursor-keys, keypad-keys) with modifiers
       (shift, control, alt).  If xterm defines a translation for a given
       combination of special key and modifier, that makes it unavailable for
       use by applications within the terminal.  For instance, one might extend
       the use of Page Up and Page Down keys seen here:

               Shift <KeyPress> Prior : scroll-back(1,halfpage) \n\
               Shift <KeyPress> Next  : scroll-forw(1,halfpage) \n\

       to the Home and End keys:

               Shift <KeyPress> Home : scroll-to(begin) \n\
               Shift <KeyPress> End  : scroll-to(end)

       but then shift-Home and shift-End would then be unavailable to
       applications.

       Not everyone finds the three-button mouse bindings easy to use.  In a
       wheel mouse, the middle button might be the wheel.  As an alternative,
       you could add a binding using shifted keys:

           *VT100*translations:      #override \n\
               Shift <Key>Home:    copy-selection(SELECT) \n\
               Shift <Key>Insert:  copy-selection(SELECT) \n\
               Ctrl Shift <Key>C:  copy-selection(SELECT) \n\
               Ctrl Shift <Key>V:  insert-selection(SELECT)

       You would still use the left- and right-mouse buttons (typically 1 and 3)
       for beginning and extending selections.

       Besides mouse problems, there are also keyboards with inconvenient
       layouts.  Some lack a numeric keypad, making it hard to use the shifted
       keypad plus and minus bindings for switching between font sizes.  You can
       work around that by assigning the actions to more readily accessed keys:

           *VT100*translations:      #override \n\
               Ctrl <Key> +:       larger-vt-font() \n\
               Ctrl <Key> -:       smaller-vt-font()

       The keymap feature allows you to switch between sets of translations.
       The sample below shows how the keymap() action may be used to add special
       keys for entering commonly-typed words:

           *VT100.Translations: #override <Key>F13: keymap(dbx)
           *VT100.dbxKeymap.translations: \
                   <Key>F14:       keymap(None) \n\
                   <Key>F17:       string("next") \n\
                                   string(0x0d) \n\
                   <Key>F18:       string("step") \n\
                                   string(0x0d) \n\
                   <Key>F19:       string("continue") \n\
                                   string(0x0d) \n\
                   <Key>F20:       string("print ") \n\
                                   insert-selection(PRIMARY, CUT_BUFFER0)

   Default Scrollbar Bindings
       Key bindings are normally associated with the vt100 or tek4014 widgets
       which act as terminal emulators.  Xterm's scrollbar (and toolbar if it is
       configured) are separate widgets.  Because all of these use the X
       Toolkit, they have corresponding translations resources.  Those resources
       are distinct, and match different patterns, e.g., the differences in
       widget-name and number of levels of widgets which they may contain.

       The scrollbar widget is a child of the vt100 widget.  It is positioned on
       top of the vt100 widget.  Toggling the scrollbar on and off causes the
       vt100 widget to resize.

       The default bindings for the scrollbar widget use only mouse-button
       events:

              <Btn5Down>: StartScroll(Forward) \n\
              <Btn1Down>: StartScroll(Forward) \n\
              <Btn2Down>: StartScroll(Continuous) MoveThumb() NotifyThumb() \n\
              <Btn3Down>: StartScroll(Backward) \n\
              <Btn4Down>: StartScroll(Backward) \n\
              <Btn2Motion>: MoveThumb() NotifyThumb() \n\
              <BtnUp>:    NotifyScroll(Proportional) EndScroll()

       Events which the scrollbar widget does not recognize at all are lost.

       However, at startup, xterm augments these translations with the default
       translations used for the vt100 widget, together with the resource
       “actions” which those translations use.  Because the scrollbar (or
       menubar) widgets do not recognize these actions (but because it has a
       corresponding translation), they are passed on to the vt100 widget.

       This augmenting of the scrollbar's translations has a few limitations:

       •   Xterm knows what the default translations are, but there is no
           suitable library interface for determining what customizations a user
           may have added to the vt100 widget.  All that xterm can do is augment
           the scrollbar widget to give it the same starting point for further
           customization by the user.

       •   Events in the gap between the widgets may be lost.

       •   Compose sequences begun in one widget cannot be completed in the
           other, because the input methods for each widget do not share context
           information.

       Most customizations of the scrollbar translations do not concern key
       bindings.  Rather, users are generally more interested in changing the
       bindings of the mouse buttons.  For example, some people prefer using the
       left pointer button for dragging the scrollbar thumb.  That can be set up
       by altering the translations resource, e.g.,

           *VT100.scrollbar.translations:  #override \n\
              <Btn5Down>:     StartScroll(Forward) \n\
              <Btn1Down>:     StartScroll(Continuous) MoveThumb() NotifyThumb() \n\
              <Btn4Down>:     StartScroll(Backward) \n\
              <Btn1Motion>:   MoveThumb() NotifyThumb() \n\
              <BtnUp>:        NotifyScroll(Proportional) EndScroll()

CONTROL SEQUENCES AND KEYBOARD
       Applications can send sequences of characters to the terminal to change
       its behavior.  Often they are referred to as “ANSI escape sequences” or
       just plain “escape sequences” but both terms are misleading:

       •   ANSI x3.64 (obsolete) which was replaced by ISO 6429 (ECMA-48) gave
           rules for the format of these sequences of characters.

       •   While the original VT100 was claimed to be ANSI-compatible (against
           x3.64), there is no freely available version of the ANSI standard to
           show where the VT100 differs.  Most of the documents which mention
           the ANSI standard have additions not found in the original (such as
           those based on ansi.sys).  So this discussion focuses on the ISO
           standards.

       •   The standard describes only sequences sent from the host to the
           terminal.  There is no standard for sequences sent by special keys
           from the terminal to the host.  By convention (and referring to
           existing terminals), the format of those sequences usually conforms
           to the host-to-terminal standard.

       •   Some of xterm's sequences do not fit into the standard scheme.
           Technically those are “unspecified”.  As an example, DEC Screen
           Alignment Test (DECALN) is this three-character sequence:

               ESC # 8

       •   Some sequences fit into the standard format, but are not listed in
           the standard.  These include the sequences used for setting up
           scrolling margins and doing forward/reverse scrolling.

       •   Some of the sequences (in particular, the single-character functions
           such as tab and backspace) do not include the escape character.

       With all of that in mind, the standard refers to these sequences of
       characters as “control sequences”.

       Xterm Control Sequences lists the control sequences which an application
       can send xterm to make it perform various operations.  Most of these
       operations are standardized, from either the DEC or Tektronix terminals,
       or from more widely used standards such as ISO-6429.

       A few examples of usage are given in this section.

   Window and Icon Titles
       Some scripts use echo with options -e and -n to tell the shell to
       interpret the string “\e” as the escape character and to suppress a
       trailing newline on output.  Those are not portable, nor recommended.
       Instead, use printf (POSIX).

       For example, to set the window title to “Hello world!”, you could use one
       of these commands in a script:

           printf '\033]2;Hello world!\033\'
           printf '\033]2;Hello world!\007'
           printf '\033]2;%s\033\' "Hello world!"
           printf '\033]2;%s\007' "Hello world!"

       The printf command interprets the octal value “\033” for escape, and
       (since it was not given in the format) omits a trailing newline from the
       output.

       Some programs (such as screen(1)) set both window- and icon-titles at the
       same time, using a slightly different control sequence:

           printf '\033]0;Hello world!\033\'
           printf '\033]0;Hello world!\007'
           printf '\033]0;%s\033\' "Hello world!"
           printf '\033]0;%s\007' "Hello world!"

       The difference is the parameter “0” in each command.  Most window
       managers will honor either window title or icon title.  Some will make a
       distinction and allow you to set just the icon title.  You can tell xterm
       to ask for this with a different parameter in the control sequence:

           printf '\033]1;Hello world!\033\'
           printf '\033]1;Hello world!\007'
           printf '\033]1;%s\033\' "Hello world!"
           printf '\033]1;%s\007' "Hello world!"

   Special Keys
       Xterm, like any VT100-compatible terminal emulator, has two modes for the
       special keys (cursor-keys, numeric keypad, and certain function-keys):

       •   normal mode, which makes the special keys transmit “useful” sequences
           such as the control sequence for cursor-up when pressing the up-
           arrow, and

       •   application mode, which uses a different control sequence that cannot
           be mistaken for the “useful” sequences.

       The main difference between the two modes is that normal mode sequences
       start with CSI (escape [) and application mode sequences start with SS3
       (escape O).

       The terminal is initialized into one of these two modes (usually the
       normal mode), based on the terminal description (termcap or terminfo).
       The terminal description also has capabilities (strings) defined for the
       keypad mode used in curses applications.

       There is a problem in using the terminal description for applications
       that are not intended to be full-screen curses applications: the
       definitions of special keys are only correct for this keypad mode.  For
       example, some shells (unlike ksh(1), which appears to be hard-coded, not
       even using termcap) allow their users to customize key-bindings,
       assigning shell actions to special keys.

       •   bash(1) allows constant strings to be assigned to functions.  This is
           only successful if the terminal is initialized to application mode by
           default, because bash lacks flexibility in this area.  It uses a
           (less expressive than bash's) readline scripting language for setting
           up key bindings, which relies upon the user to statically enumerate
           the possible bindings for given values of $TERM.

       •   zsh(1) provides an analogous feature, but it accepts runtime
           expressions, as well as providing a $terminfo array for scripts.  In
           particular, one can use the terminal database, transforming when
           defining a key-binding.  By transforming the output so that CSI and
           SS3 are equated, zsh can use the terminal database to obtain useful
           definitions for its command-line use regardless of whether the
           terminal uses normal or application mode initially.  Here is an
           example:

               [[ "$terminfo[kcuu1]" == "^[O"* ]] && \
               bindkey -M viins "${terminfo[kcuu1]/O/[}" \
               vi-up-line-or-history

   Changing Colors
       A few shell programs provide the ability for users to add color and other
       video attributes to the shell prompt strings.  Users can do this by
       setting $PS1 (the primary prompt string).  Again, bash and zsh have
       provided features not found in ksh.  There is a problem, however: the
       prompt's width on the screen will not necessarily be the same as the
       number of characters.  Because there is no guidance in the POSIX
       standard, each shell addresses the problem in a different way:

       •   bash treats characters within “\[” and “\]” as nonprinting (using no
           width on the screen).

       •   zsh treats characters within “%{” and “%}” as nonprinting.

       In addition to the difference in syntax, the shells provide different
       methods for obtaining useful escape sequences:

       •   As noted in Special Keys, zsh initializes the $terminfo array with
           the terminal capabilities.

           It also provides a function echoti which works like tput(1) to
           convert a terminal capability with its parameters into a string that
           can be written to the terminal.

       •   Shells lacking a comparable feature (such as bash) can always use the
           program tput to do this transformation.

       Hard-coded escape sequences are supported by each shell, but are not
       recommended because those rely upon particular configurations and cannot
       be easily moved between different user environments.

ENVIRONMENT
       Xterm sets several environment variables.

   System Independent
       Some variables are used on every system:

       DISPLAY
            is the display name, pointing to the X server (see DISPLAY NAMES in
            X(1)).

       TERM
            is set according to the terminfo (or termcap) entry which it is
            using as a reference.

            On some systems, you may encounter situations where the shell which
            you use and xterm are built using libraries with different terminal
            databases.  In that situation, xterm may choose a terminal
            description not known to the shell.

       WINDOWID
            is set to the X window id number of the xterm window.

       XTERM_FILTER
            is set if a locale-filter is used.  The value is the pathname of the
            filter.

       XTERM_LOCALE
            shows the locale which was used by xterm on startup.  Some shell
            initialization scripts may set a different locale.

       XTERM_SHELL
            is set to the pathname of the program which is invoked.  Usually
            that is a shell program, e.g., /bin/sh.  Since it is not necessarily
            a shell program however, it is distinct from “SHELL”.

       XTERM_VERSION
            is set to the string displayed by the -version option.  That is
            normally an identifier for the X Window libraries used to build
            xterm, followed by xterm's patch number in parenthesis.  The patch
            number is also part of the response to a Secondary Device Attributes
            (DA) control sequence (see Xterm Control Sequences).

   System Dependent
       Depending on your system configuration, xterm may also set the following:

       COLUMNS
            the width of the xterm in characters (cf: “stty columns”).

            When this variable is set, curses applications (and most terminal
            programs) will assume that the terminal has this many columns.

            Xterm would do this for systems which have no ability to tell the
            size of the terminal.  Those are very rare, none newer than the mid
            1990s when SVR4 became prevalent.

       HOME
            when xterm is configured (at build-time) to update utmp.

       LINES
            the height of the xterm in characters (cf: “stty rows”).

            When this variable is set, curses applications (and most terminal
            programs) will assume that the terminal has this many lines (rows).

            Xterm would do this for systems which have no ability to tell the
            size of the terminal.  Those are very rare, none newer than the mid
            1990s when SVR4 became prevalent.

       LOGNAME
            when xterm is configured (at build-time) to update utmp.

            Your configuration may have set LOGNAME; xterm does not modify that.
            If it is unset, xterm will use USER if it is set.  Finally, if
            neither is set, xterm will use the getlogin(3) function.

       SHELL
            when xterm is configured (at build-time) to update utmp.  It is also
            set if you provide a valid shell name as the optional parameter.

            Xterm sets this to an absolute pathname.  If you have set the
            variable to a relative pathname, xterm may set it to a different
            shell pathname.

            If you have set this to an pathname which does not correspond to a
            valid shell, xterm may unset it, to avoid confusion.

       TERMCAP
            the contents of the termcap entry corresponding to $TERM, with lines
            and columns values substituted for the actual size window you have
            created.

            This feature is, like LINES and COLUMNS, used rarely.  It addresses
            the same limitation of a few older systems by providing a way for
            termcap-based applications to get the initial screen size.

       TERMINFO
            may be defined to a nonstandard location using the configure script.

WINDOW PROPERTIES
       In the output from xprop(1), there are several properties.

   Properties set by X Toolkit
       WM_CLASS
            This shows the instance name and the X resource class, passed to X
            Toolkit during initialization of xterm, e.g.,

                WM_CLASS(STRING) = "xterm", "UXTerm"

       WM_CLIENT_LEADER
            This shows the window-id which xterm provides with an environment
            variable (WINDOWID), e.g.,

                WM_CLIENT_LEADER(WINDOW): window id # 0x800023

       WM_COMMAND
            This shows the command-line arguments for xterm which are passed to
            X Toolkit during initialization, e.g.,

                WM_COMMAND(STRING) = { "xterm", "-class", "UXTerm", "-title", "uxterm", "-u8" }

       WM_ICON_NAME
            This holds the icon title, which different window managers handle in
            various ways.  It is set via the iconName resource.  Applications
            can change this using control sequences.

       WM_LOCALE_NAME
            This shows the result from the setlocale(3) function for the
            LC_CTYPE category, e.g.,

                WM_LOCALE_NAME(STRING) = "en_US.UTF-8"

       WM_NAME
            This holds the window title, normally at the top of xterm's window.
            It is set via the title resource.  Applications can change this
            using control sequences.

   Properties set by Xterm
       X Toolkit does not manage EWMH properties.  Xterm does this directly.

       _NET_WM_ICON_NAME
            stores the icon name.

       _NET_WM_NAME
            stores the title string.

       _NET_WM_PID
            stores the process identifier for xterm's display.

   Properties used by Xterm
       _NET_SUPPORTED
            Xterm checks this property on the supporting window to decide if the
            window manager supports specific maximizing styles.  That may
            include other window manager hints; xterm uses the X library calls
            to manage those.

       _NET_SUPPORTING_WM_CHECK
            Xterm checks this to ensure that it will only update the EWMH
            properties for a window manager which claims EWMH compliance.

       _NET_WM_STATE
            This tells xterm whether its window has been maximized by the window
            manager, and if so, what type of maximizing:

            _NET_WM_STATE_FULLSCREEN

            _NET_WM_STATE_MAXIMIZED_HORZ

            _NET_WM_STATE_MAXIMIZED_VERT

FILES
       The actual pathnames given may differ on your system.

       /etc/shells
            contains a list of valid shell programs, used by xterm to decide if
            the “SHELL” environment variable should be set for the process
            started by xterm.

            On systems which have the getusershell function, xterm will use that
            function rather than directly reading the file, since the file may
            not be present if the system uses default settings.

       /etc/utmp
            the system log file, which records user logins.

       /etc/wtmp
            the system log file, which records user logins and logouts.

       /usr/share/X11/app-defaults//XTerm
            the xterm default application resources.

       /usr/share/X11/app-defaults//XTerm-color
            the xterm color application resources.  If your display supports
            color, use this

                *customization: -color

            in your .Xdefaults file to automatically use this resource file
            rather than /usr/share/X11/app-defaults//XTerm.  If you do not do
            this, xterm uses its compiled-in default resource settings for
            colors.

       /usr/share/pixmaps
            the directory in which xterm's pixmap icon files are installed.

ERROR MESSAGES
       Most of the fatal error messages from xterm use the following format:

           xterm: Error XXX, errno YYY: ZZZ

       The XXX codes (which are used by xterm as its exit-code) are listed
       below, with a brief explanation.

       1    is used for miscellaneous errors, usually accompanied by a specific
            message,

       11   ERROR_FIONBIO
            main: ioctl() failed on FIONBIO

       12   ERROR_F_GETFL
            main: ioctl() failed on F_GETFL

       13   ERROR_F_SETFL
            main: ioctl() failed on F_SETFL

       14   ERROR_OPDEVTTY
            spawn: open() failed on /dev/tty

       15   ERROR_TIOCGETP
            spawn: ioctl() failed on TIOCGETP

       17   ERROR_PTSNAME
            spawn: ptsname() failed

       18   ERROR_OPPTSNAME
            spawn: open() failed on ptsname

       19   ERROR_PTEM
            spawn: ioctl() failed on I_PUSH/"ptem"

       20   ERROR_CONSEM
            spawn: ioctl() failed on I_PUSH/"consem"

       21   ERROR_LDTERM
            spawn: ioctl() failed on I_PUSH/"ldterm"

       22   ERROR_TTCOMPAT
            spawn: ioctl() failed on I_PUSH/"ttcompat"

       23   ERROR_TIOCSETP
            spawn: ioctl() failed on TIOCSETP

       24   ERROR_TIOCSETC
            spawn: ioctl() failed on TIOCSETC

       25   ERROR_TIOCSETD
            spawn: ioctl() failed on TIOCSETD

       26   ERROR_TIOCSLTC
            spawn: ioctl() failed on TIOCSLTC

       27   ERROR_TIOCLSET
            spawn: ioctl() failed on TIOCLSET

       28   ERROR_INIGROUPS
            spawn: initgroups() failed

       29   ERROR_FORK
            spawn: fork() failed

       30   ERROR_EXEC
            spawn: exec() failed

       32   ERROR_PTYS
            get_pty: not enough ptys

       34   ERROR_PTY_EXEC
            waiting for initial map

       35   ERROR_SETUID
            spawn: setuid() failed

       36   ERROR_INIT
            spawn: can't initialize window

       46   ERROR_TIOCKSET
            spawn: ioctl() failed on TIOCKSET

       47   ERROR_TIOCKSETC
            spawn: ioctl() failed on TIOCKSETC

       49   ERROR_LUMALLOC
            luit: command-line malloc failed

       50   ERROR_SELECT
            in_put: select() failed

       54   ERROR_VINIT
            VTInit: can't initialize window

       57   ERROR_KMMALLOC1
            HandleKeymapChange: malloc failed

       60   ERROR_TSELECT
            Tinput: select() failed

       64   ERROR_TINIT
            TekInit: can't initialize window

       71   ERROR_BMALLOC2
            SaltTextAway: malloc() failed

       80   ERROR_LOGEXEC
            StartLog: exec() failed

       83   ERROR_XERROR
            xerror: XError event

       84   ERROR_XIOERROR
            xioerror: X I/O error

       85   ERROR_ICEERROR
            ICE I/O error

       90   ERROR_SCALLOC
            Alloc: calloc() failed on base

       91   ERROR_SCALLOC2
            Alloc: calloc() failed on rows

       102  ERROR_SAVE_PTR
            ScrnPointers: malloc/realloc() failed

BUGS
       Large pastes do not work on some systems.  This is not a bug in xterm; it
       is a bug in the pseudo terminal driver of those systems.  Xterm feeds
       large pastes to the pty only as fast as the pty will accept data, but
       some pty drivers do not return enough information to know if the write
       has succeeded.

       When connected to an input method, it is possible for xterm to hang if
       the XIM server is suspended or killed.

       Many of the options are not resettable after xterm starts.

       This program still needs to be rewritten.  It should be split into very
       modular sections, with the various emulators being completely separate
       widgets that do not know about each other.  Ideally, you'd like to be
       able to pick and choose emulator widgets and stick them into a single
       control widget.

       There needs to be a dialog box to allow entry of the Tek COPY file name.

SEE ALSO
       resize(1), luit(1), uxterm(1), X(1), pty(4), tty(4)

       Xterm Control Sequences (this is the file ctlseqs.ms).

           https://invisible-island.net/xterm/xterm.html
           https://invisible-island.net/xterm/manpage/xterm.html
           https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
           https://invisible-island.net/xterm/xterm.faq.html
           https://invisible-island.net/xterm/xterm.log.html

       X Toolkit Intrinsics – C Language Interface (Xt),
       Joel McCormack, Paul Asente, Ralph R. Swick (1994),
       Thomas E. Dickey (2019).

       Inter-Client Communication Conventions Manual (ICCCM),
       David Rosenthal and Stuart W. Marks (version 2.0, 1994).

       Extended Window Manager Hints (EWMH),
       X Desktop Group (version 1.3, 2005).

       EWMH uses UTF8_STRING pervasively without defining it, but does mention
       the ICCCM.  Version 2.0 of the ICCCM does not address UTF-8.  That is an
       extension added in XFree86.

       •   Markus Kuhn summarized this in UTF-8 and Unicode FAQ for Unix/Linux
           (2001), in the section “Is X11 ready for Unicode?”

           https://www.cl.cam.ac.uk/~mgk25/unicode.html

       •   Juliusz Chroboczek proposed the UTF8_STRING selection atom in
           1999/2000, which became part of the ICCCM in XFree86.

           https://www.irif.fr/~jch/software/UTF8_STRING/

           An Xorg developer removed that part of the documentation in 2004 when
           incorporating other work from XFree86 into Xorg.  The feature is
           still supported in Xorg, though undocumented as of 2019.

AUTHORS
       Far too many people.

       These contributed to the X Consortium: Loretta Guarino Reid (DEC-UEG-
       WSL), Joel McCormack (DEC-UEG-WSL), Terry Weissman (DEC-UEG-WSL), Edward
       Moy (Berkeley), Ralph R. Swick (MIT-Athena), Mark Vandevoorde (MIT-
       Athena), Bob McNamara (DEC-MAD), Jim Gettys (MIT-Athena), Bob Scheifler
       (MIT X Consortium), Doug Mink (SAO), Steve Pitschke (Stellar), Ron Newman
       (MIT-Athena), Jim Fulton (MIT X Consortium), Dave Serisky (HP), Jonathan
       Kamens (MIT-Athena).

       Beginning with XFree86, there were far more identifiable contributors.
       The THANKS file in xterm's source lists 228 in September 2020.  Keep in
       mind these: Jason Bacon, Jens Schweikhardt, Ross Combs, Stephen P. Wall,
       David Wexelblat, and Thomas Dickey (invisible-island.net).



Patch #361                         2020-10-14                           XTERM(1)