Page border can't be removed

I’ve been trying to remove a “default” border on each page of my document on my copy of LibreWriter for LibreOffice 6.3, but it just refuses to be removed. I even tried to do so through the border editing feature. No luck. What should I do to fix this?

Does the border appear also on a printed copy of your document, or does it only appear on your screen?

Actually, what is “page border” you are talking about? maybe add a screenshot to clarify.

Never mind. I took care of it.