A selecting operation and a setting operation for setup items shown on a display are performed with using a selection change switch that can in steps rotate to three positions indicated by marks and a dial switch that is stacked on the selection change switch. The display shows three setup items at three locations. In a case that the selection change switch is rotated and a tip portion of the selection change switch indicates a position, it is thought that the selection operation is performed to select a setup item shown at a location corresponding to the indicated position. Then, the setting operation for the selected setup item is performed by rotating the dial switch. When the selection change switch has pivoted toward near side or far side, a window to be shown at the foreground is changed on the display.