Apple MacBook Air (11-inch, Late 2010) - Manual (Page 30)

30 Chapter 2 Life with Your MacBook Air
Using the Multi-Touch Trackpad
Use the trackpad to move the pointer and to perform a variety of Multi-Touch gestures.
Unlike typical trackpads, the entire MacBook Air trackpad is a button, and you can click
anywhere on the trackpad. To enable Multi-Touch gestures, view instructional videos of
the gestures, and set other trackpad options, choose
Apple () > System Preferences,
and then click Trackpad.
Here are ways to use your MacBook Air trackpad:
 Two-finger scrolling lets you drag to scroll quickly up, down, or sideways in the active
window. This option is on by default.