diff options
Diffstat (limited to 'lisp/faces.el')
| -rw-r--r-- | lisp/faces.el | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lisp/faces.el b/lisp/faces.el index f316245d165..20665286b4f 100644 --- a/lisp/faces.el +++ b/lisp/faces.el @@ -1814,7 +1814,9 @@ If omitted or nil, that stands for the selected frame's display." (declare-function x-display-grayscale-p "xfns.c" (&optional terminal)) (defun display-grayscale-p (&optional display) - "Return non-nil if frames on DISPLAY can display shades of gray." + "Return non-nil if frames on DISPLAY can display shades of gray. +DISPLAY should be either a frame or a display name (a string). +If omitted or nil, that stands for the selected frame's display." (let ((frame-type (framep-on-display display))) (cond ((memq frame-type '(x w32 ns)) |