Question [SOLVED] How to remove the little bar?

[JiveDadson]

I recently upgraded to a new tablet, Galaxy Tab 8+ 5G, One-UI 6.1, Android 14.
Now on any app, there is a little bar floating at the top. I don't use it; I don't want it; I can't find how to remove it.
When pressed, it shows an small oval containing tokens for screen-in-screen or something, split screen, and an X for closing the app.
How do I rid myself of this intruder? It is driving me batty.

 

[B. Diddy]

Can you show a screenshot?

 

[JiveDadson]

Can you show a screenshot?

I tried and failed. With the previous tablet, I was continually making screenshots I didn't want. Now I can't figure out how to do it on purpose. Pressing power and down-volume at once does not work. So, add that to the question. Poor, poor, pitiful me.

 

[B. Diddy]

I found it on my Tab S9 FE+. Go to Settings>Advanced Features>Multi Window, and turn off the toggle for "Show multi window menu with 1 window."

 

[JiveDadson]

Yeah! Yea! That did it.