Looking a bit deeper, I found this topic in an earlier thread that I somehow missed when I first searched the suggestions and ideas. Please upvote there (not here) if you are interested: Control which books in the Compendium are shared with the Player Sharing feature UPDATE: Yes, this feature is being worked on. Thank you Rabulias. Here is the the time stamped roundtable where it is mentioned. Roll20 Community Roundtable: Compendium Limiter Hello, I don't see this in here, tho I may have missed it, but I think that a compendium expansion selection tool/option in the game settings would be a great addition and open the way for custom compendiums in the future. With the addition of compendium expansions in the market place, it is starting to become a problem in games that are not using specific expansions. Example: As a GM, I have purchased all of the expansions for D&D 5e provided by Wizards of the Coast and Roll20 for my players. Including optional expansions like Ravnica, Acquisitions Incorporated, Eberron, and Wildmount. I also have third party expansions from Kobold Press and Odyssey of the Dragonlords. All of hese expansions add to the compendium and charactermancer. The problem I'm having is that I'm also a player in a D&D 5e game where I can't use the what is added by the optional expansions of Wildmount, Ravnica, Acquisitions Incorporated, and the third party expansions. There is no way to remove those as a player or GM from the charactermancer and the in-game compendium, or at least an at-a-glace way to distinguish what comes from where (especially for spells in the charactermancer). This is only going to become a bigger problem as we get compendium expansions from more books, more homebrew content, and new settings. My solution if possible: Compendium section in the game settings, apart from sharing options, to authorize what can and can't be used. - It has to be in addition to the sharing option so that players that have the full compendium can access what has been approved for the game even if the GM is not currently sharing the compendium with that particular game. - Something like a whitelist of what can be used. I don't know much of how this works, but perhaps a tag of some sort added to spells, monsters, classes, races, and items to let the charactermancer and in-game compendium know what comes from where. The tag would be compared to what has been whitelisted in the game settings. If the tag is not whitelisted, then it would not be shown. This would also work to set the groundwork for allowing GMs to create their own compendium libraries in the future. But mostly, it's to solve a problem happening now, that can only get worse in the future as more creators add to this amazing platform. Thank you.