What is this feature?

[SAguy]

I didn't take a screenshot and I don't know how to replicate, but what is this annoying feature on my S21 that makes the app window smaller. Then you need to seemingly randomly click on the sides to get a popup menu to make the app full screen again?

Really wanna turn it off

 

[Gravedigger]

I didn't take a screenshot and I don't know how to replicate, but what is this annoying feature on my S21 that makes the app window smaller. Then you need to seemingly randomly click on the sides to get a popup menu to make the app full screen again?

Really wanna turn it off

I call it the one-handed feature, or picture in picture mode...

 

[Gravedigger]

I call it the one-handed feature, or picture in picture mode...

Found it. Settings > Advanced > One handed mode (switch off)

 

[RedViking]

I didn't take a screenshot and I don't know how to replicate, but what is this annoying feature on my S21 that makes the app window smaller. Then you need to seemingly randomly click on the sides to get a popup menu to make the app full screen again?

Really wanna turn it off

Xiaomi has it as well. Flippen annoying.