Variable: ediff-use-faces
ediff-use-faces is a customizable and buffer-local variable defined in
ediff-init.el.gz.
Documentation
If t, differences are highlighted using faces, if device supports faces.
If nil, differences are highlighted using ASCII flags, ediff-before-flag and ediff-after-flag. On a non-window system, differences are always highlighted using ASCII flags.
Source Code
;; Defined in /usr/src/emacs/lisp/vc/ediff-init.el.gz
(defcustom ediff-use-faces t
"If t, differences are highlighted using faces, if device supports faces.
If nil, differences are highlighted using ASCII flags, ediff-before-flag
and ediff-after-flag. On a non-window system, differences are always
highlighted using ASCII flags."
:type 'boolean
:group 'ediff-highlighting)