Package xemacs: Information

XEmacs (and regular GNU Emacs, too) is a self-documenting, customizable,
extensible, real-time display editor.  XEmacs is self-documenting
because at any time you can type in control-h to find out what your
options are or to find out what a command does.  XEmacs is customizable
because you can change the definitions of XEmacs commands to anything
you want.  XEmacs is extensible because you can write entirely new
commands--programs in the Lisp language to be run by Emacs' own Lisp
interpreter.  XEmacs includes a real-time display, which means that the
text being edited is visible on the screen and is updated very
frequently (usually after every character or pair of characters) as you
type.

Package xemacs: Information

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