How to add page break between file documents in master document libreoffice writer?

I have created master document in libreoffice and added some subdocuments (odt) and I need to put page break between them. Every new document needs to start with new page. I have found some answers on forum but there are not very clear. Thanks in advance!

1. Before this I used different page style, so I used manual break to use different page style for rest of document. I need to remove this enter tag, if I delete it, it deletes a manual page break.
2. I need to add page break.

I got this answer at ask.libreoffice.org and I think it is worth of share.

If your sub-documents represent chapters in your book, you have a much more elegant solution than adding manually page breaks in the master.

I assume that your files are all styled (which is a necessity when working with master + subs otherwise formatting becomes a nightmare) and you assigned Heading 1 to the chapter headings.

Then customize Heading 1 in the master to add a page break (before) in the Text Flow tab properties.

An even better approach is to share all styles between master and subs with a personal template. Master and subs should be based on this template. A template brings in the possibility to automatically update formatting of all documents: change the style definition in the template; next time you open a document, you’re asked if you accept the update.