According to the embodiments of the present invention, since {HEAD ~ the presence} or {TAIL ~ absence} of a display on the display unit in the first area can be changed depending on whether or not the area display mode should be enabled, it is possible to improve convenience regarding focusing 
According to the embodiments of the present invention , since { HEAD ~ the presence } or { TAIL ~ absence } of a display on the display unit in the first area can be changed depending on whether or not the area display mode should be enabled , it is possible to improve convenience regarding focusing
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