I can play films in full screen, and I can stretch the window vertically to get what appears to be normal ratios, but I cannot adjust the viewer horizontally (in fact, it's actually slightly larger than the viewable area on my CRT, hanging about 1/8" off the side), and it starts in widescreen whether I'm trying to open a film directly, or just starting the viewer up by itself. It's the damnedest thing.