You can choose between these actions-Jump To The Next Page or Jump To The Spot That’s Clicked-by setting the Click In The Scroll Bar To option in the General preference pane. It’s easier to click where I want to go-three-quarters of the way down on the scrollbar-than to drag the scroller to get there. (By default, when you click in a scrollbar, that’s what happens.) But sometimes-in a long document, for instance-I know that I want to go to a point about three-quarters of the way through the document. Most of the time, I click in a scrollbar-for example, in Apple’s Safari or Microsoft Word-to move my view a full page or screen at time. Here are five of my favorite Option-key tricks. Its capabilities have only increased with time, so it’s always worth pressing Option to modify a click or drag, just to see what might happen.
Since the earliest days of the Mac, it has provided access to special font characters revealed alternative commands in menus and let you Option-drag to create a copy of something, such as a Finder icon or a graphic selection (from MacPaint to Photoshop CS5!).
The Option key is the unsung hero of the keyboard.