Basic Operation 
Operating Your Computer 
32 Reference Guide 
2.  Click the TouchPad tab, and select the device you want to disable from the pull-down 
menu. 
3.  Select Disable This Device near the bottom of the window. 
4. Click OK. 
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.  
 
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+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+F12  Enters Hibernate mode. 
Fn+NumLock  Toggles Scroll Lock on and off. 
 
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. 
A USB keyboard does not support Fn hot keys.