Table of Contents Drive Document Method

New Sites now has a Table of Contents feature so this method is not needed.

This page may help.

As I recall, I used the Insert, Bookmark function to make the "Top of page" text a bookmark. and then linked to it from places in the text using the link function in the toolbox that looks like a chain link, selecting the bookmark as the link target.

When you click a TOC link in the document you then click on the result to go to that area.

Table of contents example