You can use the Magnifier feature as you would a magnifying glass to enlarge text and images on any section of your screen. For example, you can use the Magnifier to read a small block of text on a Web page or to easily see a part of a picture in a photo editing program.
If the Magnify command was not assigned to a button on your mouse by default, you can assign it to one. For information about reassigning mouse buttons, see How do I reassign my mouse buttons?
Other mouse buttons will function as usual when the Magnifier is turned on.
There are two screen magnifying modes available with Windows 7, full screen magnification and lens magnification.
The Magnifier keeps your settings between each use. For example, if you close the Magnify window in lens mode, it will open in lens mode the next time that you open it.