You seem to have found the information you need. :-) Just one more word of advice for future reference: a section break stores the formatting of the
preceding section. That is why deleting a break may produce results that you do not expect (regarding section type, header/footer content, etc.).
The details of what happens when you delete a break are summarized in the article
https://wordmvp.com/FAQs/Formatting/...thSections.htm (but note that the detailed descriptions of how to find the various settings haven't been updated for the most recent versions of Word).