Customization Guide (.pdf) - Documentation & Online Help - Autodesk

NOTE When you create a pull-down or shortcut menu, you must also add at least
one command to the menu. Otherwise, the menu will not be displayed on the
menu bar.
Quick Reference
Commands
CUI
Manages the customized user interface elements in the product.
System Variables
MENUBAR
Create a Pull-Down Menu
You can create a pull-down menu, add submenus and commands to it on the
Customize tab of the Customize User Interface (CUI) Editor.
You can create and modify standard pull-down menus to display and organize
the commands to best match the way you work. Commands are added to a
pull-down menu from the Command List pane. Once commands are added
to a pull-down menu, you can change the caption displayed for the command
on the menu, reposition commands, and organize commands using separators.
Along with separators, you can also group commands using submenus. For
more information on submenus, see Create Submenus on page 227.
As you modify the positioning of commands on menus, the online Help
system is automatically updated to reflect the change through the Dynamic
Help feature. For more information about how Dynamic Help affects
customization, see How Customization Has Changed on page 48.
NOTE When you create a menu, you should determine in which workspaces you
want to display the menu in. By default, a new menu is displayed in all workspaces.
Pull-Down Menu Aliases
Pull-down menus should have one alias in the range of POP1 through POP499.
Menus with an alias of POP1 through POP16 are loaded by default when a
menu loads. All other menus must be added to a workspace to be displayed.
Pull-down and Shortcut Menus | 213