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 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. Table 1-6. Fn Hot Keys HP Omnibook 6000/6100 Product Information 1-7 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 Mutes the computer’s speakers.
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. Fn+F12 Enters Hibernate mode. Fn+NumLock Toggles Scroll Lock on and off. Fn+UP ARROW Increases sound volume (on Omnibook 6000 models only). Fn+DOWN ARROW Decreases sound volume (on Omnibook 6000 models only).