HP Notebook PC - Manual (Page 28)

Basic Operation
Operating Your Notebook
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, and then release both keys.
This hot key Does this
Fn+F1 Decreases the display brightness.
Fn+F2 Increases the display brightness.
Fn+F5 Toggles among the built-in display, an external
display, and simultaneous display on both.
Fn+F8 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).
Fn+F12 Enters Hibernation.
Fn+NumLock Toggles Scroll Lock on and off.
Fn+Page Up Increases the audio volume and cancels the mute
setting.
Fn+Page Down Decreases the audio volume.
Fn+Backspace Mutes/unmutes the audio output.
20 Startup Guide