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 the dxDropDownMenu, dxPopover, dxActionSheet or 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.