When you right-click a toolbar button that is implemented by a macro script, a pop-up menu appears.
Displays the Edit Macro Button dialog, which lets you change the button's appearance and its tooltip. This is documented in the MAXScript Help: See "Customizing MacroScript Buttons."
Deletes the button from the toolbar.
Opens a MAXScript Editor window, which lets you edit the button's script.
Opens the Toolbars panel of the Customize User Interface dialog, which lets you customize the contents of the current toolbar (or any other toolbar).