We can select the camera format or aspect ratio on the OnePlus smartphone to take wide shots of landscapes or panoramas, for example.

Depending on the phone model and its screen format (for example, 16:9 or 21:9), we have the following options:

Android 10 | OxygenOS 10.0
Step 1:  Open the  Camera app
Step 2:  Open the  Settings
Step 3:  Tap on  Aspect ratio
Step 4:  Choose  4:3, Full  or  1:1
  1. Open the Camera app
  2. Open the Settings
  3. Tap on Aspect ratio
  4. Choose 4:3, Full or 1:1

OnePlus Instructions