an example can be found on AMOSPro_Tutorial:Tutorials/Menus/Menus_6.AMOS
Re-activates a set of menu items which have been greyed out with the MENU INACTIVE instruction.
Menu Active level
Activates an entire level.
Activates a single item. The position of the item in the menu tree is set with a list of index numbers such as 1,2,3. Depending on the type of your menu, you can include as many as eight parameters.
Menu Active(1,2) Menu Active(1,2,3,4,5)