Online collaboration, often restricted to text or voice chat, does not make it easy to use the complex symbols that are the lifeblood of many scientific disciplines. Cocreate, an open-source, ad-hoc interactive whiteboard system, makes this much easier. While interactive whiteboards do exist already, many of them are tied to specific video-call systems, some require creating user accounts, and few are self-hostable and open source. Cocreate, on the other hand, makes cooperative whiteboarding as simple as going to the server, getting a link, and sharing that ilnk with your collaborators.