May 26, '06 07:30:00AM • Contributed by: Anonymous
If you could get a video projector with quadratic display size, everything would be fine. It would signal to the Mac a quadratic screen size (e.g. 768 x 768). If you would display pictures on that screen (e.g. with iPhoto), then portrait format would have the same size as landscape format pictures, each having black bars on top/bottom or left/right. But there is no such device.
So, lets cheat a little bit. With SwitchResX you can define a new custom resolution for the connected video projector. I defined 768 x 768 with 60 Hz to be somewhat on the conservative side at first. (You have to reboot to make this new resolution available.)
My video projector (an old NEC) accepted the new resolution without a problem, although the picture was not quite quadratic yet. I had to fiddle around a little bit with display width and zoom (I had to adjust "pace") but finally: voila, the display was quadratic. Now slide shows are much for fun, with a lot of portrait format pictures. Of course, you lose a bit of the native resolution of the video projector, since you do not use all the pixels of the rows, but that's OK by me.
