Virtual Magnifying Glass is a easy to use screen screen magnification tool which has mulitple monitor support.
The program shows a magnifying glass lens that follows the mouse movement. You can move the lens around the screen to view magnification of any screen area. You can resize the lens using the arrow keys and zoom in and out with the mouse scroll wheel.
To close the lens, click the left mouse button. A taskbar icon offers a shortcut to launch the lens again and to customise the program.