Huawei Mate 8 - Manual (Page 190)

Convenient features, making life easier for you
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Mirror
Wish you had a mirror with you when you were out at a party? Your phone comes with
a mirror app to help you maintain that stunning look while you're out and about.
Open Mirror.
Play recording through earpiece
Pause
Add a bookmark
Zoom in or out
Change mirror frame
Adjust brightness