Other Ways to Bring Up Dashboard
Besides clicking on the Dock icon or pressing F4 on your keyboard (F12 on older keyboards), there are a number of other ways you can bring up Dashboard. You choose these by going under the Apple menu and choosing System Preferences. When the System Preferences dialog appears, click on Exposé & Spaces. When that preference pane appears, click on the Exposé tab, and at the bottom of this pane there is a pop-up menu that lets you choose a different F-key for opening Dashboard (so if you wanted to use F4 for something else, you can choose to have Dashboard open with a different F-key—just select it from the Hide and Show pop-up menu). However, you can also have Dashboard open when you move your cursor to a specific corner of the screen (for example, you could have it open when you move your cursor to the bottom-left corner of the screen). You choose this option at the top of this Exposé pane. In the Active Screen Corners section at the top, in the pop-up menu closest to the bottom-left corner of the screen thumbnail, choose Dashboard (as shown above), then close the Preferences dialog. Now when you move your cursor down into that corner of the screen, Dashboard will open.