Add that PBM and XPM image specs may have :foreground nil, and

:background nil.

diff --git a/etc/NEWS b/etc/NEWS
index 4cc9220f9e754a4c76ed2445333d7d85611e760e..9a0f0f83e27c0c205782ba4f7c0f45a86c7c8851 100644 (file)
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -3896,13 +3896,13 @@ properties supported are
 
 `:foreground FG'
 
-FG must be a string specifying the image foreground color.  Default
-is the frame's foreground.
+FG must be a string specifying the image foreground color, or nil
+meaning to use the default.  Default is the frame's foreground.
 
 `:background BG'
 
-BG must be a string specifying the image foreground color.  Default is
-the frame's background color.
+BG must be a string specifying the image foreground color, or nil
+meaning to use the default.  Default is the frame's background color.
 
 XBM images can be constructed from data instead of file.  In this
 case, the image specification must contain the following properties
@@ -3961,13 +3961,13 @@ mono images are
 
 `:foreground FG'
 
-FG must be a string specifying the image foreground color.  Default
-is the frame's foreground.
+FG must be a string specifying the image foreground color, or nil
+meaning to use the default.  Default is the frame's foreground.
 
 `:background FG'
 
-BG must be a string specifying the image foreground color.  Default is
-the frame's background color.
+BG must be a string specifying the image foreground color, or nil
+meaning to use the default.  Default is the frame's background color.
 
 **** JPEG, image type `jpeg'