Menus can help drive circulation. This request covers the ability to show a menu once the user has clicked/tapped on a button presented on the page. The most common patterns for presenting a menu seem to be:

• Upon pressing the menu button, the menu overlays the content on the page. There's some way to get rid of the menu either by clicking/tapping another button/link (likely in the same place as the original button) or by clicking/tapping outside the menu area.
• Once the button is pressed, the menu slides in from the side and displaces the content (it slides as well). You can get rid of the menu either by clicking some button in the newly exposed menu area or by clicking in the content area (if some of it is still visible on-screen).