1.Shift & Spin
Ever wonder what happens when you hold down the Shift key on a web page and spin the wheel on your wheel mouse? Explorer goes either back or forward, depending on which direction you spin.
Give it a try. Open up Internet Explorer(or any other browser) and follow a few links. Then, hold down your SHIFT key and spin that wheel.
2.CTRL & Spin
If you are in a web browser (Explorer or Netscape or Firefox) , hold down your Ctrl key and spin the wheel. It makes the text larger or smaller depending on which way you spin. For Opera users, it magnifies both the images and the text.