Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1998-09-24
2000-08-29
Huynh, Ba
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
707530, 707540, G06F 1300
Patent
active
061115754
ABSTRACT:
A graphical undo/redo manager provides a graphical indication of multiple tasks that were recently performed. A user may undo multiple tasks in one step by selecting a task the user wishes to revert to, and the graphical undo/redo manager then undoes all the commands that were done subsequent to the selected task, taking the computer program to a desired state in only one user operation. In similar fashion, a user may redo multiple tasks in one step by clicking on a selected subsequent task (that was previously undone) that the user wishes to go forward to, and the graphical undo/redo manager then redoes all the commands between the last undo and the selected task, including the selected task. In addition, the graphical undo/redo manager provides for collapsing multiple tasks into a marker, either automatically when certain commands are executed in the computer program or upon command by a user for future reference.
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patent: 5890181 (1999-03-01), Selesky et al.
patent: 5907410 (1999-05-01), Ohtake
patent: 5911074 (1999-06-01), Leprince et al.
WordPerfect 6.1 for Windows, Jan Weingarten, Undelete and Undo, p. 94-104, 1995.
Martinez Anthony Edward
Rahn Michael David
Huynh Ba
International Business Machines - Corporation
Martin Derek P.
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