--- Jeff Hellige wrote: The switch sounds like an adapter I've seen up on eBay a couple of times that supposedly allowed you to switch between the standard screen ratio (90 x 60 dpi) and the modified Mac XL screen ratio (72 x 72 dpi). --- end of quote --- This sounded very likely, however I flipped it back and forth while the machine was booted and nothing noticeable happened. Hmmm. -- MB