How does oppo phone flip the photos in the mirror?

Setting method of self-timer flip function of mobile phone:

1, ColorOS 12 and above: enter the camera APP > selfie preview interface > click _ in the upper right corner, and select settings > open the "save selfie mirror".

2. coloros11-1.3 version: enter the camera app of the mobile phone > selfie preview interface > click "gear" or ":"or "_" in the upper right corner, and select Settings > Advanced Settings > Open the selfie mirror.

3. version 7-7.2 of coloros: enter camera app > mobile phone selfie preview interface > click "_" or ":"in the upper right corner, and select settings > open selfie mirror.