A method on a client device is described. First document content information that corresponds to a first plurality of document elements of an electronic document is received from a data server. A graphical user interface that represents the first plurality of document elements is generated based on the first document content information. First author identifiers that indicate most recent authors for the first plurality of document elements are received. The first document content information and the first author identifiers correspond to a first timestamp. Visual identifiers for the first author identifiers are selected based on the graphical user interface. The visual identifiers are generated to indicate which of the first author identifiers correspond to the first plurality of document elements represented by the graphical user interface.