How do I get rid of Multi Window / Split screen for apps?

[GMan956]

I would like to turn off Multi Window / Split screen for all apps but have not been able to find a way. The "Multi window for all apps" toggle is off but apps will still open in split screen view. All the toggles under "Multi window" are also off.

When I open a new app I would like the previous to close and open the new one in full screen.

How do I prevent apps from opening in spit screen?

I am using Samsung Galaxy S21FE with android 14 and One UI 6.1

[Charkatak]

Go to settings, tap magnifying glass and search for multi window. This will show you couple of spots where you can check.