Groupware features are described that support asynchronous collaboration for a synchronous collaboration environment. During a synchronous collaboration session, a document is displayed at a user's computing device. As changes to the document are received at the user's computing device, a change list is updated and the modified document is displayed. Any changes from the user are broadcast to other participants. For asynchronous collaboration during the session, a user-specific fork is created in the change list to contain private changes for the user. For each private change from the user, the groupware updates the change list in the user-specific fork with the private change, which is not broadcast to the other participants for reconciliation.