;;;###autoload
(define-minor-mode auto-image-file-mode
- "Toggle visiting of image files as images.
-With prefix argument ARG, turn on if positive, otherwise off.
-Returns non-nil if the new state is enabled.
+ "Toggle visiting of image files as images (Auto Image File mode).
+With a prefix argument ARG, enable Auto Image File mode if ARG is
+positive, and disable it otherwise. If called from Lisp, enable
+the mode if ARG is omitted or nil.
-Image files are those whose name has an extension in
+An image file is one whose name has an extension in
`image-file-name-extensions', or matches a regexp in
`image-file-name-regexps'."
:global t