How to remove dotted cell lines in Excel?

Question

excel

Hello.
For some reason, in the workspace of fields in Excel, the sheet is broken by some dotted lines at intervals, what is it and how to remove it?
A photo.

Thanks

spoiler

Answer 1

Either these are the borders of the cells, or the borders of the print area

Answer 2

You have the book view "Normal" enabled, and the dotted line in this view displays the print area.
Try changing the view to "Page Mode".

Answer 3

These are page borders. Hide like this:
https://www.google.com/search?q=excel+hide+page+br...