| 摘要 |
<p>PROBLEM TO BE SOLVED: To receive user's operation in various modes with high ease of operation in spite of a portable type. SOLUTION: An operation part of a multi-function key 7 is constituted of a cross-direction key 7a and a ball part 7b disposed in the center of the cross- direction key 7a. In receiving designation of an arbitrary coordinate position on a display LCD 5, the designated coordinate position is changed according to the rotation of the ball part 7b. In receiving selective designation of an arbitrary one of a plurality of items, designation for a change in a selective targeted item is received with the cross-direction key 7a, and decisive designation is received by pressing down the ball part 7b.</p> |
