To do this, click on the place in the page that you would
like to link to. Then go to insert -> section anchor, and name
the anchor. Now highlight the text that you would like to become
the link and go to insert -> link -> drafts and recent pages.
In that menu, select the current page you're working on as the page
to link to, and display the advanced options below that list. There
is a drop down menu for section anchors, and select the appropriate
anchor. Simple as that, good luck!