Is it possible to have two dms in one Roll20 game?

My brother and I want to co-DM a West Marches styled game, but can't figure out how we can both have permissions in the one game. I could be missing something someone else has said, but I didnt find anything. I'd just rather not have two separate games for the one campaign

One of you will be the creator and therefore defacto GM, once the other has joined the game you'll be able to promote them to co-GM on the game page (not in the VTT itself). Co-GMs have almost as much power as the creator but it is worth noting that any future subscription based benefits you might want will be based on the creators account so if that is a potential route you'll take in the future you'll want to agree whose account would get the upgrade ;)