@cindex defining menus
@cindex menu prompt string
@cindex prompt string (of menu)
+@cindex menu item
A keymap acts as a menu if it has an @dfn{overall prompt string},
which is a string that appears as an element of the keymap.
@node Extended Menu Items
@subsubsection Extended Menu Items
@kindex menu-item
+@cindex extended menu item
An extended-format menu item is a more flexible and also cleaner
alternative to the simple format. You define an event type with a