You should also be aware that when modules are loaded in the VGD frame, the available area is reduced to about 530 x 400 pixels. Therefore, graphics, especially, should not exceed these dimensions or they will not display completely when projected. For example, a 2 X 2 inch image with a resolution of 150 dpi will be about 4 X 4 inches on a 72 dpi monitor. Try to keep graphics files smaller than 30K. Large files take a long time to load, especially over telephone lines. Keep text simple and large enough to read, especially if you intend to project your pages via LCD-panel during class.
Illegible pages are useless pages.
Ideally, they reinforce text-based information but do not merely repeat the information. Use common sense. Highly textured backgrounds, while distinctive, are tiring to read from. The same goes for bright colors. They make an impression, but you probably do not want to present 15 pages of required reading for your class on a page that makes your eyes bleed.