57.2 Easy Customization Interface
Emacs has many settings which have values that you can specify
in order to customize various commands. Many are documented in this
manual. Most settings are user options—that is to say, Lisp
variables (see Variables)—so their names appear in the Variable
Index (see Variable Index). The other settings are faces and
their attributes (see Faces).
You can browse interactively through settings and change them using
M-x customize. This command creates a customization
buffer, which offers commands to navigate through a logically
organized structure of the Emacs settings; you can also use it to edit
and set their values, and to save settings permanently in your
~/.emacs file (see Init File).
The appearance of the example buffers in this section is typically
different under a window system, since faces are then used to indicate
buttons and editable fields.