Doc menu-bar-update-hook.

diff --git a/lispref/keymaps.texi b/lispref/keymaps.texi
index e8edf59b2a0468740c16cbb8ac4e24fffb67ce74..52189797c1c7ee18623f16f06bb6842bd0d650bb 100644 (file)
--- a/lispref/keymaps.texi
+++ b/lispref/keymaps.texi
@@ -1700,6 +1700,12 @@ value is @code{(help)}; thus, the @samp{Help} menu item normally appears
 at the end of the menu bar, following local menu items.
 @end defvar
 
+@defvar menu-bar-update-hook
+This normal hook is run whenever the user clicks on the menu bar, before
+displaying a submenu.  You can use it to update submenus whose contents
+should vary.
+@end defvar
+
 @node Modifying Menus
 @subsection Modifying Menus