vides).
</p>

<h3 id="do_not_substitute_message">If an activity has no Options menu, do not display a message</h3>

<p>
  When the user presses the <em>Menu</em> button, if there is no Options menu, the system
  currently does nothing.  We recommend you do not perform any action (such as
  displaying a message).  It's a better user experience for this behavior to be
  consistent across applications.
</p>



<h3 id="dim_hide_menu_items">Dim or hide menu items that are not available in the current context</h3