To Use The Fn Hot Keys - HP OmniBook 4100 Reference Manual

To use the Fn hot keys

The combination of the Fn key plus another key creates a hot key—a
shortcut key sequence—for various system controls. The OmniBook
keyboard shows the Fn hot keys labeled in gray.
Fn + F1
Fn + F2
Fn + F3
Fn + F4
Fn + F5
Fn + F8
Fn + F12
Fn + S
Fn + R
Fn + ScrLk
Fn + UP ARROW
Fn + DOWN ARROW
If you are using an external keyboard, the Fn key = CTRL+ALT.
Decreases the display's brightness.
Increases the display's brightness.
Decreases the display's contrast (non-TFT displays only).
Increases the display's contrast (non-TFT displays only).
Switches among the built-in display, an external display, and
simultaneous displays.
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.
Enters Hibernate mode.
Enters Standby mode.
Enters Suspend mode
Toggles Scroll Lock on and off.
Increases the volume.
Decrease the volume.
Operating the OmniBook
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