| 摘要 |
What is provided is a system and method for time sequencing editing steps for allowing users to visualize and modify the editing history of a two-dimensional digital document. A three-dimensional image of the document is presented to the user with time of editing being represented as a third dimension. This three-dimensional presentation of editing operations provides the user with an "omniscient" perspective of the document where part of all of a document's editing history is represented. The document state at any point in its life, as affected by various previously preformed editing operations, is given by a corresponding slice through the three-dimensional object. The user is provided with an ability to manipulate the three-dimensional representation to not only undo prior operations but also to perform different editing operations at anytime in the editing history of the document, and thereby change the editing history of the document. Various embodiments are disclosed.
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