To Use The Function Hot Keys - HP Compaq NX9000 Reference Manual

To use the function hot keys

The combination of the Fn key plus another key creates a hot key—a shortcut key
sequence—for various system controls. To use a hot key, press and hold Fn, press
the appropriate second key, then release both keys.
This hot key
Fn+F1
Fn+F2
Fn+F8
Fn+F12
Fn+NumLock
Fn+Page Up
Fn+Page Down
Fn+Backspace
Does this
Decreases the display brightness.
Increases the display brightness.
Toggles the built-in keypad on and off. Does not affect
an external keyboard. If Num Lock is on, then the
numeric functions are active. Otherwise, cursor control
is active (as marked on an external keyboard).
Enters Hibernation.
Toggles Scroll Lock on and off.
Increases the audio volume and cancels the mute
setting.
Decreases the audio volume.
Mutes/unmutes the audio output.
Basic Operation
Operating Your Notebook
Reference Guide 19