| 摘要 |
A "Selective Undo Function" for computer programs allows a user to select any single specific action that was previously recorded by the computer, and undo only that selected action, rather than every action that chronologically follows the specific action. Specifically, the computer program may undo just the selected action, even if the selected action is not the last action taken by the user, if that is possible; or the computer program may perform some analysis and undo other actions that are deemed prerequisites to undoing the selected action, upon user confirmation; or if the analysis performed by the computer program cannot determine what these prerequisites are or cannot perform the undo function, then the computer program may take a default action, e.g., undo the selected action as well as all actions that follow the selected action, in chronological order.
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