A word processing system includes an undo function monitor that monitors the history of a user's use of the undo operation. Depending upon the pattern detected, the system disables the particular auto-formatting feature that triggered the undesired automatic operation. In an illustrative embodiment, the system tracks whether a number of undo operations exceeds a programmable threshold. In one illustrative implementation, the system also tracks the number of times a user has undone, i.e., reversed, an automatic formatting operation compared with the number of instances where the user has permitted the subject automatic formatting operation to take place.