“My tablet doesn’t do Landscape mode!”

Not every app takes advantage of the tablet’s capability to reorient itself when you rotate the device between Portrait and Landscape modes — or even Upside-Down mode. For example, many games set their orientations one way and refuse to change, no matter how you hold the tablet. So, just because the app doesn’t go into Horizontal or Vertical mode doesn’t mean that anything is broken.

Confirm that the orientation lock isn’t on: Check the Quick Actions. Ensure that the Rotation Lock item isn’t turned on; if so, the screen doesn’t reorient itself.