Sony VGN-CS21S/T User Manual page 39

To adjust the playback volume
To
Increase the volume
Keep increasing the volume
Decrease the volume
Keep decreasing the volume
Turn off the volume
Restore the volume
✍
You can start swiping from anywhere on the volume control area to adjust the playback volume.
Actions
Press .
Press and hold .
Swipe your fingertip to the right over the volume control area.
Press .
Press and hold .
Swipe your fingertip to the left over the volume control area.
Press twice.
Press twice when the volume is turned off.
Press or , or swipe your fingertip over the volume control area.
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Using Your VAIO Computer