Qtextdit format A4

[Jacky2678]

Hello
As part of a project to create data sheets I have to perform a semblance of word processing. The sought features are quite simple:

manage the formatting of the text;
manage printing;
manage page breaks with header and footer when printing;
save the work done.

I want to show in my program the page breaks when they take place. And there I block a little ...
I heard about Qtextdocument but I do not know how I can use it.

I come to you to know if among you someone already has work on a similar project and if so could he give me some tips to advance properly?
S

My main concerns being how to handle the necessary page deletions related, for example, to deletions of lines in the first page, how to pass the writing in page 1 automatically in page 2 without the user intervenes. HOw ot set the size of QtextEdit to make it a little A4 format like on Word.
Thak you