Question / Help I dont know what i did and it created 2 split screens on my obs and i want it to be 1

[Artforever]

Why does my obs have 2 screens when before it was 1 this litteraly made my recording fps Slower by 90% idk how to stop this madness help plz

 

[alpinlol]

You enabled studio mode which shows you a secondary preview including a transition.
Click on Studio Mode again to disable it.