in windows 7, you can press and hold down the windows key and press + to zoom in on the screen.  with the aero glass interface the experience is very similar to mark russinovich’s zoom it.

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you can press the + key multiple times to really emphasize a portion of the screen and by default once zoomed the zoom follows the mouse around the screen (so you can navigate an enlarged desktop on a projector).

zoom it version 4 has also been enhanced – check it out along with other systernals downloads on technet.