Using Fn 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. External PS/2 keyboards support only Fn+F5, Fn+F7, and Fn+F12. To use these, press and hold left CTRL+left ALT, press the appropriate second key, then release both keys. External USB keyboards do not support Fn hot keys. Table 1-6. Fn Hot Keys HP Omnibook 500 Product Information 1-9 Hot Key Effect 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+F7 Audio mute. 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+F9 Toggles Num Lock on and off. Fn+F10 Toggles Scroll Lock on and off. Fn+F11 Pause. Fn+F12 Enters Hibernate mode. Fn+HOME Prints screen. Fn+UP ARROW* Increases sound volume. Fn+DOWN ARROW* Decreases sound volume. * Only if marked on the ARROW keys.