It's been a few years for me, but my group basically went with something we found on 1d4chan for our Roll20 setup back then. We used the text tool to mark how many levels were in each building. We used one of the circles that pop up when a token is selected to mark which level the model was on. We ignored a lot of their house rules. <a href="https://1d4chan.org/wiki//TG/heim" rel="nofollow">https://1d4chan.org/wiki//TG/heim</a>