Here are additional functions for creating and working with faces.
This function returns the face number of face face. This is a number that uniquely identifies a face at low levels within Emacs. It is seldom necessary to refer to a face by its face number.
This function returns the documentation string of face face, or
nilif none was specified for it.
tif the faces face1 and face2 have the same attributes for display.
This returns non-
nilif the face face displays differently from the default face.
A face alias provides an equivalent name for a face. You can
define a face alias by giving the alias symbol the
property, with a value of the target face name. The following example
modeline an alias for the
(put 'modeline 'face-alias 'mode-line)
This macro defines
obsolete-faceas an alias for current-face, and also marks it as obsolete, indicating that it may be removed in future. when should be a string indicating when
obsolete-facewas made obsolete (usually a version number string).