* You can double-click a word to highlight it in any document, e-mail or Web page.
* You can hide all windows, revealing only what’s on the computer desktop, with one keystroke: hit the Windows key and “D” simultaneously in Windows, or press F11 on Macs (on recent Mac laptops, Command+F3; Command is the key with the cloverleaf logo). That’s great when you want examine or delete something you’ve just downloaded to the desktop, for example. Press the keystroke again to return to what you were doing.
* You can enlarge the text on any Web page. In Windows, press Ctrl and the plus or minus keys (for bigger or smaller fonts); on the Mac, it’s the Command key and plus or minus.
* You can also enlarge the entire Web page or document by pressing the Control key as you turn the wheel on top of your mouse. On the Mac, this enlarges the entire screen image.
* You can tap the Space bar to scroll down on a Web page one screenful. Add the Shift key to scroll back up. * When you’re searching for something on the Web using, say, Google, put quotes around phrases that must be searched together. For example, if you put quotes around “electric curtains,” Google won’t waste your time finding one set of Web pages containing the word “electric” and another set containing the word “curtains.”
* If you can’t find some obvious command, like Delete in a photo program, try clicking using the right-side mouse button. (On the Mac, you can Control-click instead.) * Google is also a units-of-measurement and currency converter. Type “teaspoons in 1.3 gallons,” for example, or “euros in 17 dollars.” Click Search to see the answer.
* You can switch from one open program to the next by pressing Alt+Tab (Windows) or Command-Tab (Mac).
* You don’t have to type “http://www” into your Web browser. Just type the remainder: “nytimes.com” or “dilbert.com,” for example. (In the Safari browser, you can even leave off the “.com” part.)
thanks for the tips via apartment therapy