Huawei Mate 8 - Manual (Page 36)

First use and initial setup
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You can also open Gallery, touch and hold an image, and then touch > Set
as > Wallpaper. Follow the onscreen instructions to set the image as the wallpaper.
•
Shake your phone to change the wallpaper: Turn on the Shake to change switch.
The wallpaper will change every time you shake your phone. Turn on the Random
change switch, and then set Interval and Album to display. Your phone will
automatically change the wallpaper at the specified time interval.