1. Make sure photo mode is active
2. Open bottom edge options
3. Check that an aspect ratio option button is present
4. Tap on the aspect ratio button
5. At most two possible aspect ratios should appear, one of them highlighted; on arale one should read 5:3 and the other 4:3
6. On arale if 5:3 is selected, the whole screen should be filled by the viewfinder, if 4:3 is selected, only the top part of the screen should be filled by the viewfinder
7. Switch to the other camera and start again at step 1.