Virtual desktop size refers to creating more than what your monitor can actually see. So when you want to see other parts of the actual screen, you scroll to the next desktop. Depending on how many sections you divide up your screen, you'll have different number of virtual desktops. Personally, I find it very confusing, but the plus is that you don't have to buy a bigger monitor to see bigger graphics. You can also adjust the contrast - a term which is often confused with brightness.
Contrast changes the relationship between light and dark elements of the display.
A high contrast image is stark, like a black and white tiled floor. Brightness changes the amount of light that is emitted by the display. This means that if you increase your brightness, everything on your display gets brightened up. Dorman Toh is an avid gamer, and an assistant webmaster with AsiaOne. 2000 SPH AsiaOne Ltd. All rights reserved.