There are three Insert choices in the context menu: Insert Menu Item, Insert Menu Item At End, and Insert Submenu Item. Use the first two to insert menu items in the same menu as the selected item, and use Insert Submenu Item to create a new drop-down or cascading menu for the selected item.
Suppose you have created a File menu on the menu bar with two menu items: Open and Exit. Here are the results of some insert operations:
A new item is added to the menu bar after the File menu.
A new item is added to the File menu above Open.
A new item is added to the File menu after Exit.
A new cascading menu is added to the Open menu item.
The first thing you do with a new menu item is add the first item to the menu bar. Then continue adding new items to the menu bar or to the menu bar item you just created. As you work, the changes you make appear in both the WYSIWYG and Tree Menu views.