Quickly Zoom In and Out of Any Windows 7 Application
To quickly zoom in to any part of your screen, hit the Windows key and +. By default, the Magnifier will zoom in 100% increments, but you can change this in the tool settings. Hold down the Windows and – keys at the same time to zoom back out.
Other quick keyboard shortcuts, once you have the Magnifier tool up, include:
CTRL + ALT + L to bring up the lens display view
CTRL + ALT + D to dock the magnification area.
CTRL + ALT + F brings you back to the full screen mode.
In some applications, such as your web browser and Photoshop, you can use CTRL + and CTRL – instead to zoom in. But if you ever want to get a closer look at something in Windows 7 and the CTRL + shortcut doesn’t do anything for you, try using the Windows key instead of the CTRL key.