Slow Motion Recording
Record videos in slow motion to watch fast-moving scenes in detail.
1. Open 
Camera.
2. Swipe right on the screen and touch Slow-mo.
3. Touch
to start a video recording. Touch the screen to focus on an object or area during recording.
4. Touch
to end the recording.
Slow motion recording works best in bright surroundings. To select the video clip portion to be played in slow motion, refer to Cropping slow-motion videos.
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Huawei Mate 10 Manual [PDF]