Huawei Ascend Mate7 MT7-TL10 - Manual (Page 57)

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Music and video
Touch to lock the screen. After the screen is locked, you
will not be able to perform any operations on the video playing
interface.
•
Flick left or right to forward or replay the video.
•
Flick up or down at the left side of the screen to adjust the
screen brightness.
•
Flick up or down at the right side of the screen to adjust the
volume.
Touch to disable or enable DTS mode.
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