It seems, in order to play Roll20 I need to give local admin rights to the players for their character sheets. I have just removed a player from my group for upping his XP when he thought I wasnt looking. I am not always looking - so PLEASE is there a way in which players can be 1) stopped from having local admin right to their sheet but still play with it sensibly (HPs, Temp HP, adding items , amending spell usage etc) 2) protected from "mistakes" by creating a log of all changes to the sheets so that I can parse the log and call out mistakes.