| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation input device for an image formation device that can maintain operability as to a key of high importance for avoidance of a contact of a holding hand even when a display screen is contracted.SOLUTION: On the basis of a display screen displayed by display means, a priority order of operation keys is determined by operation key priority determination means, and further a key displayable area capable of displaying an operation key is judged by key display area judgement means. On the basis of a determined priority order of an operation key, a display form is determined that includes a size and/or a layout of the operation key in a key displayable area judged by the key display area judgement means, and the operation key is displayed on a contracted display screen in the determined display form. |
