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(elisp)Special Keysyms

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System-Specific X11 Keysyms
===========================

   To define system-specific X11 keysyms, set the variable
`system-key-alist'.

 - Variable: system-key-alist
     This variable's value should be an alist with one element for each
     system-specific keysym.  Each element has the form `(CODE .
     SYMBOL)', where CODE is the numeric keysym code (not including the
     "vendor specific" bit, -2**28), and SYMBOL is the name for the
     function key.

     For example `(168 . mute-acute)' defines a system-specific key
     (used by HP X servers) whose numeric code is -2**28 + 168.

     It is not crucial to exclude from the alist the keysyms of other X
     servers; those do no harm, as long as they don't conflict with the
     ones used by the X server actually in use.

     The variable is always local to the current terminal, and cannot be
     buffer-local.  Note: Multiple Displays.