PROPS are additional items to add to the menu item specification. See
Info node `(elisp)Tool Bar'. Items are added from left to right.
-ICON is the base name of a file cnntaining the image to use. The
-function will try to use first ICON.xpm, ICON.pbm then ICON.xbm using
-`find-image'.
+ICON is the base name of a file containing the image to use. The
+function will first try to use ICON.xpm, then ICON.pbm, and finally
+ICON.xbm, using `find-image'.
Keybindings are made in the map `tool-bar-map'. To define items in
some local map, bind `tool-bar-map' with `let' around calls of this