What if I want to find figure X from chapter Y? What if the chapters are much longer than a page length would be? What if there's only 3 figures in a 100000 wor

What if I want to find figure X from chapter Y? What if the chapters are much longer than a page length would be? What if there's only 3 figures in a 100000 word document? These aren't impossible problems. A well formatted index or table of contents gets you most of the way there. But what if we used some sort of immutable reference? We could add new reference locations after some fixed amount of content such that they're never too far away, and we could even print these references at the bottom of each section for ease of use!