Sony S User Manual

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Using Your VAIO Computer
Using Special-function Buttons
Your computer is equipped with special buttons to help you use specific functions of the computer.
 
Special-function button
Functions
S1/S2 buttons 
 
By default, the S1 button turns the volume on and off and the S2 button toggles the display output between 
the LCD and external device. You can change these button assignments on the window for changing the S 
button assignments. To display this window, press and hold either button or launch and navigate through 
VAIO Control Center.