Abstract: A copying machine has plural infeed capabilities, being provided for example with plural sheet supply units supplying sheets of different respective types or formats. A control panel is provided with a plurality of operator-activated dual-purpose select-and-start switches. When the operator activates one of these switches, this both selects the respective infeed capability and also commands initiation of copying, so that the operator need not thereafter press a second switch merely to initiate copying. The select-and-start switches are pushbutton switches the pushbuttons of which are translucent and provided, behind them, with respective signal lamps. During a copying operation, the signal lamp behind the one of the select-and-start switches which commanded copying lights up, to indicate that copying is occurring. If one of the supply units is exhausted, the respective signal lamp begins to blink, thereby indicating this to the operator.