The menu title can be one or more lines of text that identify the menu, plus any other brief information about the use of the menu. Each displayed menu entry consists of the selection number for that line and the text describing the action to be performed. To perform an operation listed in the menu, type the selection number listed to the left of the operation and press the Return key. Menu selection numbers do not need to be contiguous. For example, menu entry 1 might be reserved for help across all menus, while menu entry 9 might be reserved as the exit.
Some menus contain submenus that are opened by selecting a higher-level menu entry.