| 摘要 |
PROBLEM TO BE SOLVED: To improve the operability at the time of using a key exclusively used for a standard copy. SOLUTION: A standard copy possibility judging means B judges whether copying operation on a standard copy condition can be executed or not, and when the copying operation can be executed, a light emission control means C allows a light emitting display part on the key used exclusively for the standard copy to emit light. Further, when the copying operation on the standard copy condition can not be executed, a couce discriminating means D discriminates the cause of the fact and when the absence of a paper sheet in a selected tray as the standard copy condition is the cause, an another tray presence judging means E judges the presence or absence of another tray in which the same size sheet as that in the selected tray is set. When another tray exists, the light emission control means C allows the light emitting display part to emit the light. When the key exclusively used for the standard copy is depressed, a copying control means A changes the selected tray to another tray, to execute the copying operation on the standard copy condition and a changed contents display means D displays the changed contents, in accordance with the change. |
