It goes hand in hand with OS X Lion.
The Multi-Touch gestures in OS X Lion make everything you do on MacBook Air more intuitive, direct, and fun. And the spacious Multi-Touch trackpad is perfectly designed for them, whether it’s a three-finger swipe to activate Mission Control or a four-finger pinch to see all your apps in Launchpad. Gesture responses in Lion are smooth and realistic.
Click
Press down anywhere to click. Or, with Tap to Click enabled, tap the trackpad.Double-click
Press down two times anywhere. Or, with Tap to Click enabled, double-tap the trackpad.Tap to zoom
Double-tap the trackpad with two fingers to magnify a web page or PDF.Two-finger scroll
Slide two fingers up or down the trackpad to scroll through documents, websites, and more.
Swipe to navigate
Flip through web pages, documents, and more like thumbing pages in a book.View Mission Control
Swipe up on the trackpad to get a bird’s-eye view of everything running on your Mac.
