Similar to toolbar buttons that are described in the Add a Toolbar Button tutorial, menu items are also commands, but they are presented by menu items in a UI. A menu is displayed by a drop-down menu or the Popover, ActionSheet, application bar widget based on the device on which the application is running. However, you don't have to concern yourself with this. Instead, denote a command as a menu. In this tutorial, you will learn how to do this.