In an earlier Tech-Recipe I described how to configure Growl to keep notifications on your screen when you are away from your computer. If you are an internet socialite, follow a number of chatty Twitter-ers, or somehow manage to get a slew of notifications, closing them one at a time may make you think lowly of me for ever suggesting that you have your growls stick around as you slowly click to close them one at a time. But never fear, a simple click is all it takes to dispatch all of your notifications at once.
If you have configured your Growl to keep notifications on your screen when your computer is idle, you can quickly end up with a screen full of growls upon your return.
Instead of clicking the close box on each notification one at a time, you can close all of them by pressing option while you click the close box of any one of the notification boxes (shown below).