set the variable so that the button you clicked on becomes selected.
@item :key-sequence @var{key-sequence}
-This property specifies which key sequence is likely to be bound to the
-same command invoked by this menu item. If you specify a correct key
-sequence, that sequence will be preferred over others.
-
-If you specify an incorrect key sequence, it has no effect; before Emacs
-displays @var{key-sequence} in the menu, it verifies that
-@var{key-sequence} is really equivalent to this menu item. Specifying
-@code{nil} for @var{key-sequence} is equivalent to the
+This property specifies which key sequence to display as keyboard equivalent.
+Before Emacs displays @var{key-sequence} in the menu, it verifies that
+@var{key-sequence} is really equivalent to this menu item, so it only
+has an effect if you specify a correct key sequence.
+Specifying @code{nil} for @var{key-sequence} is equivalent to the
@code{:key-sequence} attribute being absent.
@item :keys @var{string}
@table @code
@item :keys @var{keys}
-@var{keys} is a keyboard equivalent to the menu item (a string). This
-is normally not needed, as keyboard equivalents are computed
+@var{keys} is a string to display as keyboard equivalent to the menu item.
+This is normally not needed, as keyboard equivalents are computed
automatically. @var{keys} is expanded with
@code{substitute-command-keys} before it is displayed (@pxref{Keys in
Documentation}).
@item :key-sequence @var{keys}
-@var{keys} is a hint for speeding up Emacs's first display of the
-menu. It should be @code{nil} if you know that the menu item has no keyboard
-equivalent; otherwise it should be a string or vector specifying a
-keyboard equivalent for the menu item.
+@var{keys} is a hint indicating which key sequence to display as
+keyboard equivalent, in case the command is bound to several key sequences.
+It has no effect if @var{keys} is not bound to same command as this
+menu item.
@item :active @var{enable}
@var{enable} is an expression; if it evaluates to @code{nil}, the item