An autochanger includes an imaging device affixed to a media handling device. The nozzle further includes first and second outlets, and first and second passages. Multiple thumbnails provided for respective image data are displayed as a list in a specific thumbnail display area on a window. The male portion may be provided on one or two sides of the accessory depending on a rail configuration of the file folder. While the network system is initialized, the method defines the role of each network port of each network node in each sub-network. In this process, since the operating knob is not pivoted around its axis without limit but it is restricted so that pivoting is possible only in a predetermined angle range, it is not necessary to change the grip on the operating knob when pivoting the operating knob, the burden on the wrist is lessened, and the operability is improved.