Dumb question, but how do I get the preview screen back to one screen, not "Preview Scene" and "Program Scene"?

[NickSteel]

Somehow, I keep doing something that changes from the one only center preview screen.

 

[PaiSand]

Click the same button you clicked to use the Studio view, which is out of the border of your image (down right).

 

[NickSteel]

Thanks, feel like a dummy, but it works now.