An electronic device is disclosed that can simultaneously display basic function screens for a plurality of functions, and can also display one of these basic function screens or a lower level screen corresponding to a selection item in the one basic function screen in an enlarged format. When an initial screen is displayed and a selection item in a basic function screen is dragged to a display button, all of the basic function screens will be deleted, and a lower level screen corresponding to the selection item will be displayed in an enlarged format in the display area of a display unit. In addition, when the initial screen is displayed and an area outside the selection item in a basic function screen is dragged to the display button, the basic function screens will be deleted except for the basic function screen whose area was dragged to the display button, and that basic function screen will be displayed in an enlarged format in the display area of the display unit.

 
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