* lisp/image-mode.el (image-mode-winprops-alist): Add docstring.

diff --git a/lisp/image-mode.el b/lisp/image-mode.el
index f52668536ca786ce26c362bce8236f43c4710f15..ce56208c6dfe052f6252ba01ea0f39574fa7e774 100644 (file)
--- a/lisp/image-mode.el
+++ b/lisp/image-mode.el
@@ -43,7 +43,10 @@
 
 ;;; Image mode window-info management.
 
-(defvar-local image-mode-winprops-alist t)
+(defvar-local image-mode-winprops-alist t
+  "Alist of windows to window properties.
+Each element has the form (WINDOW . ALIST).
+See `image-mode-winprops'.")
 
 (defvar image-mode-new-window-functions nil
   "Special hook run when image data is requested in a new window.