For maximum flexibility, you can selectively turn on or off different finger gestures. To customize your trackpad, follow these steps:
Click the Apple menu and choose System Preferences. The System Preferences window appears. (Alternatively, click the System Preferences icon on the Dock.)
Click the Trackpad icon that appears in the Hardware category. The Trackpad window appears, as shown in Figure 2-4.
Change the settings under the Point & Click, Scroll & Zoom, and More Gestures tabs so the trackpad will behave the way you want it to. (See the following sections for details on these settings.)
Depending on your hardware, certain touch gestures may not be available.
Figure 2-4. The Trackpad window lets you turn the different ...