Turn off split screen mode S7

[AC Question]

My phone S7 running 7.0 has gone into multi /split screen mode.
How do I get it back to normal mode?

I googled and found suggestion to install 'multiwindow toggle'.
It toggles on and off but screen stays in split screen mode,

REALLY annoying ... please help me return it to normal

 

[bennett22]

try this=settings-advanced features-multi window-turn off split screen view

 

[C Drake]

try this=settings-advanced features-multi window-turn off split screen view

This is not an option, when I open Multi Window all it says is

"Split screen view action" and "Pop-up view action"

Both are off for me and I still get that incredibly stupid and annoying split screen all the time when I don't want it.

Threads complaining about this go back years, is there a fix?