How to lock the exposure brightness of oppo mobile phone camera

Generally, mobile phones will automatically adjust the appropriate exposure according to the environment. If you are not satisfied with the automatic exposure, you can adjust it manually. Enter the photo mode, click the focus box on the screen, and there will be a+/-symbol next to it. You can increase or decrease the exposure of a photo by sliding your finger up and down on the screen.

This answer applies to all OPPO models.