When you hear Virtual desktop manager maybe you think that such a program will make your monitor screen virtually bigger - wider and higher. This is the way most of virtual desktop managers are implemented. goScreen is different. It makes your desktop deeper. That is why I prefer to call it multi-page monitor manager.
Think of your desktop as a sheet of paper. It has one visible surface. Now imagine that there is a number of surfaces, or pages, with only one visible at a time.
All the pages are of the same size - size of your monitor screen and are placed one above other, as opposed to one beside other. That is how goScreen works.