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

NOTE Swapping can lead to some strange behavior for tablet menus, because
they typically have a different number of macros.
Use the following syntax in a macro to swap elements:
$section=customizationgroup.menuname
The following describes each section of the macro syntax for swapping
elements:
Macro syntax for swapping elements
$ Loads an interface element
section Specifies the element type. Valid names are:
A1-A4 for Aux menus 1 through 4
B1-B4 for mouse buttons 1 through 4
P0-P16 for pull-down menus 0 through 16
I for the image tile menu
T1-T4 for tablet menus 1 through 4
customizationgroup Specifies the customization group that menuname is a
member of (not necessary if menuname is in the main CUIx file).
menuname Specifies which section or submenu to insert. It is the main label
or alias for the section to load
A pull-down menu can be present either in the menu bar or on the active
shortcut menu but not both.
Quick Reference
Commands
CUI
Manages the customized user interface elements in the product.
Use Conditional Expressions in Macros
You can add conditional expressions to a macro by using a command that
introduces macro expressions written in DIESEL (Direct Interpretively Evaluated
String Expression Language).
Create Macros | 111