Customization Window
You can modify the layout of controls at runtime by invoking customization mode. The customization mode can be invoked by right-clicking the layout (right-click on empty space or the captions of items or groups) and selecting Begin customization from the context menu. Doing this invokes customization mode, simultaneously opening the Customization Window.
Closing the Customization Window finishes layout customization.
For more information, see Customization Mode.