To Create a Sub-menu

1. From the Mac OS menu bar, click Tools menu Customize Interface (CUI) or at the Command prompt, enter cui.
2. In the Customize dialog box, on the Menus tab, under Menus List, expand the Menus or Shortcut Menus node, and then expand the menu where you want to add a sub-menu.
3. Select the menu item you want to insert the new sub-menu after.
4. Click the Create Menu Element (+) button below the Menus list and click Add Sub-menu.

   A new sub-menu (named Sub-menu1) is created. The default name changes based on the number of sub-menus you previously created.

5. Enter a name for the new sub-menu.
   Note: If needed, click a sub-menu name twice to rename it.
6. In the Commands list, drag a command to the new sub-menu.
7. Release the button on the pointer device when the menu or sub-menu is highlighted, or the desired location for the command is indicated by a horizontal line.