If you don't want just the "Top" idea, you create a Bookmark, to jump to any
place in a page. At the place you want to jump to (in FP this is Insert >
Bookmark).
Then, at the place you want the link to the bookmark, highlight the text,
right click , create hyperlink, then in the hyperlinks screen go to
"Bookmarks" button, and it will list all for that page. Choose the one you
want. Click OK out of the screens.
To add a link to a book mark in another page and link to it from a different
page, create the bookmark in the "destination" page (as per above) then from
the "source" page, create the link in the Hyperlinks box, put the web
address in the field, then click the "Bookmarks" button, and you'll find the
bookmark listed on the page you're linking to. CHose it and OK out of the
windows.
In both cases, test/preview in browser(s) as this may not work in FP Preview
mode.