Basic Operation Operating Your Notebook 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. ?? To use a hot key, press and hold Fn, press the appropriate second key, then release both keys. External keyboards do not support Fn hot keys. 32 Reference Guide 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, the numeric functions are active; otherwise, cursor control is active (as marked on an external keyboard). Fn+Num Lock Toggles Scroll Lock on and off. Fn+Page Up Increases the volume (and turns audio on if muted). Fn+Page Down Decreases the volume. Fn+Backspace Toggles the mute function on and off. Fn+any One-Touch button Toggles the One-Touch button LEDs on and off (selected models).