Again I am fairly new to using a Mac on a daily basis so I am coming across many tips and tricks as I become more familiar with my new laptop. One thing that was different on a Mac than on Windows was the fact that there is not a Page Down and a Page Up on the Mac keyboard. The good news is a simple key combination provides the functionality for both Page Down and Page up. Use the information below to page down and page up on your Mac OSX computer.
Page Up On Mac OSX Lion:
fn + up arrow
Function Key + Up Arrow Key
Page Down On Mac OSX Lion:
fn + down arrow
Function Key + Down Arrow
The above key combinations will provide the same functionality as page up and page down on a Windows keyboard.