General Setup
Volume
Tap 
in the Setup menu to enter Volume settings menu for volume adjusting, as shown below:
Tap the 
to decrease the volume.
Tap the 
to increase the volume.
Then tap 
to confirm or tap 
to cancel.
Align Screen
Tap 
in the Setup menu to align the screen, as shown below.
Tap the center of the cross with your finger. When the cross moves to another position, tap and hold the center of the new target. Repeat each time to complete the calibration process. When tapping the screen on the final step, the new settings will be stored and you are returned to the Display menu.
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