Text edit system with enhanced undo user interface

摘要

Present edit systems having undo/redo functions are typically inflexible and do not permit users of computer systems to make use of these functions to the greatest advantage. The disclosed edit system having an enhanced undo interface, permits the selective display of undo elements intermixed in the edit view of the document with actual text elements and positioned relative to the affected text The user may select any undo element and selectively restore changes to the text. A series of user interface enhancements provide the user with a flexible set of capabilities for manipulating and assessing changes to a document.