To Create a Submenu on a Menu

1. Click Manage tab Customization panel User Interface. Find
2. In the Customize tab, Customizations In <file name> pane, click the plus sign (+) next to the Menus node to expand it.
3. Select the menu you want to add a submenu to.
   
4. Right-click the menu. Click New Sub-menu.

   The new submenu (named Menu1) is placed at the bottom of the Menu.

5. Right-click Menu1. Click Rename and enter a new submenu name.
6. In the Properties pane, Description box, optionally enter a description for the submenu.
   
7. In the Command List pane, drag the command that you want to add to the submenu in the Customizations In <file name> pane.
   
8. Continue adding commands until the new submenu is complete.
9. Click Apply.