Sometimes the screen rotation will not appear in the status bar on your Galaxy S8. If you have upgraded to Android Nougat, the screen rotation feature has been replaced with an identical feature with a different name. You can still rotate your device by following the tips below.
Whether your screen is rotating automatically or not, you’ll need to open the status bar and tap one of the corresponding options to fix the issue. If your Galaxy S8 is not rotating, you’ll need to tap the “Portrait” button to enable the auto-rotate feature.
If your Galaxy S8 is rotating, you’ll need to tap the “Rotate screen” button to lock the Galaxy S8 into the orientation it is currently in. From now on, the rotation button in the status bar on your Galaxy S8 will also showcase the current orientation of your smartphone.
You should be able to fix rotation problems by tapping this button until its name changes to the rotation type you’d like to use.