Add a "menu" of links to each unit at the top, and a link back to the top at each unit
Simple set of bookmarks within the HTML output with links to each unit and a link at each unit back to the list. Something like this:
This is essentially what I was asking for in https://battlescribe.uservoice.com/forums/55066-general/suggestions/33620239-add-the-option-to-create-an-index-of-all-units-in , I do think this is a much nedded addition!
Another example: http://dode74.com/40k/nids1500v1.html