Editable graphical histories

The authors have designed a testbed system that creates a series of automatically generated panels that depict in chronological order the important events in the history of a users session with Chimera, a graphical editor. The authors´ system heuristically determines the contents of each panel and the actions that it illustrates. The user can scroll through the sequence of panels, reviewing actions at different levels of detail, and selectively undoing, modifying, and redoing previous actions.<>