Live presentation sessions are carried out by broadcasting non-image events of a presenter, which non-image events are subsequently performed over instances of shared content that are stored at user devices of a set of audience members. A live presentation can be initiated when two or more users that are authorized to access a content object stored in a shared content repository are authenticated. The presentation session proceeds with delivery of individual instances of the content object to each of the user devices corresponding to a presenter's user device and an audience member's user device. Upon detection of presentation actions that occur over one of the instances of the content object, the presentation actions are codified into a non-image event object, which is then sent to the audience member's user device. Continuing presentation actions are carried-out over respective instances of the content object at the user device of the audience member.