1. An apparatus for navigating display sequence maps, the apparatus comprising: a hardware processor; and one or more stored sequences of instructions which, when executed by the processor, cause the processor to carry out the steps of: outputting, to a display device, a plurality of content views in response to receiving a plurality of requests for content views via a user interface, each of the plurality of content views includes revisions viewable as selectable text in an electronic document or webpage, wherein at least one of the plurality of content views comprises a link that enables navigation to another one of the plurality of content views; outputting, to the display device in response to a request via the user interface, a hierarchical representation of a sequence of the plurality of content views, the hierarchical representation comprising a plurality of visual representations corresponding to the plurality of content views, the sequence including at least a first revised content view at a first level of the hierarchical representation and a second revised content view at a second level of the hierarchical representation, the second revised content view including revisions from the first revised content view and new revisions; outputting, to the display device, the first revised content view in response to a selection from the hierarchical representation via the user interface of one of the plurality of visual representations corresponding to the first revised content view, and deleting the first revised content view such the revisions from the first revised content are deleted while the new revisions in the second revised content view are retained to create a final revised content view in the hierarchical representation, which is then outputted to the display device.