| 摘要 |
A portable electronic device includes a display unit which displays, simultaneously side by side, a plurality of main items aligned in one direction as the setting items of the portable electronic device and a plurality of sub items aligned in the one direction as the setting items of the lower layer of the main items, a first rotary dial which selects at least one of the plurality of main items, and a second rotary dial which selects at least one of the plurality of sub items. The first and second rotary dials are arranged while making their rotation axes parallel to each other and perpendicular to the one direction.
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