Seeing page breaks while editing

#1

How do I make it so that I can see the page breaks while editing?

#2

Ok, found it, I had missed it.

Document -> Page -> Format -> Screen Rendering -> Paper

This was on the manual, on Getting Started.

In order to obtain full wysiwygness, you should in particular 
select Document→Page→Type→Paper and 
Document→Page→Screen layout→Margins as on paper.