Hello there, I usually preopen every tab I expect to possibly need in the session to have immediate access to them. PCs, NPCs, enemies, items, locations, house rules. But in rare cases you have to reload the page due to a bug (not neccessarily of Roll20, but also for example of the browser) or you lose the internet connection for a moment or you just accidently close the tab. In either case I have to open every single sheet again and have to hope not needing to lookup another one. I dm this party now for 2,5 years and we are in our third module, with some homebrew interims inbetween and my players can always go back to previous places. Thus I can not really reduce the amount of sheets I have to organize and skim every time. And since already the position of opened sheets are remembered for the expand and minimize feature, when opened, I hope that also the information, which sheets were opened last time, could be either automatically remembered and restored by Roll20 or be saved in a set, which I could open with a simple button. Here a screenshot I took a while ago of an average session preparation: