How do I set a word doc back to its default setting?

These weired lines keep appearing when I try to add page breaks and I don’t have the regular one inch margines even though it’s on the normal template. All my pages are also merged together for some reason and I don’t know how to put it back to normal. Ive gone through the Font setting and layout and design settings, and I still can’t find out what’s wrong

?2018-04-13T02:11:03Z

yes you did