| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigator wherein when a user has performed misoperation, the state can be easily returned to the state before the misoperation and a new operation is enabled. SOLUTION: This navigator is equipped with a user interface which displays operation menu on a display device 7 and selects the next operation from the items of the operation menu. A control part 16 of the navigator displays the operation menu on the display device 7 in response to operation of the user. The control part 16 stores the items of the operation menu selected by the user in a history storing part, as the history of operations. The history of operations is displayed on the display device 7. When the items of the history is selected by the user, the control part returns the state to the operation stage before the operation which the item of the history shows has been performed. |
