Some applications do not have their adaptation for OnePlus tablets and mainly do not support full-screen display in landscape mode. Worry not, as you can modify the app's display size in the Settings of your OnePlus Tablet. Keep reading below to learn how.
How to change the display orientation
Go to [Settings] > [Special features] > [Display size] > choose an app and select a display ratio of [4:3] or [16:9].
If there is no corresponding application in compatibility mode, try opening the Parallel Window using the path below:
Go to [Settings] > [Special features] > [Dual windows], open the corresponding application, and toggle the switch to enable.