1. A method for generating and navigating a graphical representation of a workflow history of an electronic document, the method comprising: accessing a plurality of data objects stored in a memory, wherein each data object stores information related to a different event generated by an application that is configured to modify the document; identifying a first time and a second time during which the application generates events; selecting at least a first data object from the plurality of data objects, wherein the first data object includes a timestamp reflecting a time that is equal to either the first time or equal to the second time or falls in between the first time and the second time; dividing the document into n×m cells, wherein each cell represents two or more pixels of the document; adding to a slot in an n×m array a first pointer to the first data object, wherein the first pointer in the n×m array associates the first data object with at least a first cell that was changed in the document as a result of a first event generated by the application; generating a graphical representation of the first data object; and causing the graphical representation of the first data object to be displayed in a graphical user interface associated with the application.