Huawei P10 PLUS User Manual page 128

Adjust the screen brightness: Swipe up or down on the left-hand side of the screen.
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Swipe up to increase the brightness, or swipe down to decrease the brightness.
Adjust the volume: Swipe up or down on the right-hand side of the screen. Swipe up to
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increase the volume, or swipe down to decrease the volume.
Rewind or fast-forward: Drag the progress bar left to rewind, or right to fast-forward.
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Music and Video
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