Clarify Extended Menu Items a bit more

* doc/lispref/keymaps.texi (Extended Menu Items): Expand a bit
more on how submenus are formed (bug#26428).

diff --git a/doc/lispref/keymaps.texi b/doc/lispref/keymaps.texi
index 130ff0d867156ddf62414fb06ed5959bdf25cba0..6635f50960a5aa79f04d7443972e604172891a8f 100644 (file)
--- a/doc/lispref/keymaps.texi
+++ b/doc/lispref/keymaps.texi
@@ -2167,9 +2167,10 @@ string.  Thus, the string need not be a constant.
 
 The third element, @var{real-binding}, can be the command to execute
 (in which case you get a normal menu item).  It can also be a keymap,
-which will result in a submenu.  Finally, it can be @code{nil}, in
-which case you will get a non-selectable menu item.  This is mostly
-useful when creating separator lines and the like.
+which will result in a submenu, and @var{item-name} is used as the
+submenu name.  Finally, it can be @code{nil}, in which case you will
+get a non-selectable menu item.  This is mostly useful when creating
+separator lines and the like.
 
 The tail of the list, @var{item-property-list}, has the form of a
 property list which contains other information.