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-rw-r--r--lisp/image-mode.el5
1 files changed, 4 insertions, 1 deletions
diff --git a/lisp/image-mode.el b/lisp/image-mode.el
index f52668536ca..ce56208c6df 100644
--- 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.