I was gifted a bunch of monster manuals on R20 and have no idea how to access them in game. I Want to have them be accessible in such a way it is in pre made modules like Mad Mage. Can I have some assistance understanding how to get it to work. QUOTE:" How do I use the compendium after I've purchased it? You can view the Creature Codex on the web here . In any D&D 5th Edition game on Roll20, you can access it from your compendium tab (i). You can filter for Creature Codex, or simply search for your favorite creature and drag them right onto the tabletop! View the complete compendium wiki ."