Apple MacBook Pro (15-inch, 2.53 GHz, Mid 2009) - Manual (Page 26)

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