Sony VPCB1190X - Manual (Page 36)

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Using Your VAIO Computer >
Using Special-function Buttons
Using Special-function Buttons
Your computer is equipped with special buttons to help you use specific functions of the computer.
Special-function button Functions
Muting button
Turns the volume on and off.
S1 button
Executes the task that is assigned to the button by default.
You can change the default assignment with the VAIO Control Center.