Well, I tried that, and a little message box popped up in the same area as the display drop down menu stating that "The spy communication shield has blocked access to..."  and next to these words was a picture of the little Bryce display icon, and then Bryce froze (had to use ctrl-alt-del to get out).  

I have no idea what's causing this, as I don't know that my Spyware program (Webroot Sypsweeper) or anitvirus program (EZ-Tust Antivirus) function to block changing display modes in Bryce????

Intel Core I7 3090K 4.5 GhZ (overclocked) 12-meg cache CPU, 32 Gig DDR3 memory, GeoForce GTX680 2gig 256 Bit PCI Express 3.0 graphic card, 3 Western Difgital 7200 rpm 1 Tb SATA Hard Drives