Huawei P20 User Manual page 67

Use Tail Light Trails to Capture the Lights of the City
Tail light trails lets you create artistic photos of car tail lights at night.
Shoot from a distance and slightly above your subject for best results. Ensure that car
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headlights do not point directly at the camera, as this can overexpose the image.
Place your device on a tripod or solid surface so that it does not move during the exposure.
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Open , and go to Camera > More > Light painting. Hold your Phone steady, and then touch
to start shooting. A preview of the image is displayed in the viewfinder. Touch
finished.
Camera
when you are
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