Apple DVD Studio Pro 4 - Manual (Page 312)

Actions Drop Palette options
• Layout style buttons are only applied to existing buttons (no new
buttons are created).
An exception is if the menu has no buttons, in which case all
buttons from the layout style will be added.
Apply to Menu (default option)
• Layout style buttons are all applied, replacing existing buttons
and adding new ones (if necessary).
Apply to Menu—Add All Buttons
312 Chapter 13 Creating Menus Using the Standard Method