Just to add, the editor is a very basic text editor (i believe it has some "code-friendly" functionality, ie closures, colored tags, etc...) Most people code locally in their favorite editor than copy/paste and save to roll20's editor. Recently roll20 added a "sandbox" feature that allows a sheet author to skip the copy/paste/save routine and simply link to their local html, css, and json files to refresh the sandbox code. The older editor is still available(can't have any other users in your sandbox games) but the new sandbox option is a MUCH faster process now! Regular game settings editor New sandbox