Fixed and scrolls in the frame / layers

Hey there!

I have a question regarding the screenshot below. You see ‘Fixed’ and ‘Scrolls’ and I am not sure where it would help me in the process because mostly, I find them annoying since the elements are (seemingly) placed randomly in the Fixed or Scrolls zone.

Does someone know if I can turn this off? Or can someone explain how to work properly with this?

Thanks so much in advance!