ocr: Workbench Window Icens Tools VBackdrop AB Execute Command. AE Redraw All Update All Last Message Holding down the right Mouse About... A? button, Move the Mouse to the Quit.. A0 Workbench Menu bar. Workbench3.0 Pull the Mouse down the Menu until Backdrop' is highlighted, then release the Mouse button. Backdrop basically Means wether you have a border surrounding your Workbench or not. Backdrop on