If we take a lot of photos with the Xiaomi smartphone and want to get a little orientation for the perfect snapshot, we can activate the grid lines. This feature helps us to align the camera straight and find a good cut of the horizon. The grid is divided into 3x3 boxes.

Android 10 (MIUI 12.0)
Step 1:  Open the  Camera app
Step 2:  Open the  menu
Step 3:  Enable or disable  Show gridlines
  1. Open the Camera app
  2. Open the menu
  3. Enable or disable Show gridlines

Xiaomi Instructions