Huawei Mate 8 - Manual (Page 136)

Camera and Gallery
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Set a photo as the home screen wallpaper: When viewing a photo in full-screen
mode, touch > Set as > Wallpaper to set it as the home screen wallpaper.
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View image details: Touch to view the image details, such as the ISO, exposure
compensation, and resolution.
Viewing photos in chronological order
Go to the Photos tab. Photos are automatically displayed in chronological order. Touch
> Settings, and then turn on the Show time switch to display the time a photo was taken.
View photo details
Overlay menu