Pointing Devices and Keyboard - Windows Vista

Using QuickLook 2
The function of the info button varies, depending on whether you have configured QuickLook 2 or not.
Before you configure QuickLook 2, pressing the info button opens Info Center, regardless of whether
the computer is on, off, in the Sleep state, or in Hibernation. After you configure QuickLook 2, pressing
the info button opens either Info Center or QuickLook, depending on the power state of the computer.
Power state Button behavior
Off Opens QuickLook
Hibernation Opens QuickLook
On Opens Info Center
Sleep Opens Info Center
Using QuickLook 2 13