--- 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