INPUT DEVICE OF PORTABLE ELECTRONIC APPARATUS, CONTROL METHOD OF INPUT DEVICE, AND PROGRAM

摘要

An input device for a portable electronic apparatus comprises: a display unit that displays a plurality of input keys; a touch panel unit including at least one touch panel provided on the display unit; and a control unit that controls and causes the display unit to display a second input key substantially at a same location as a first input key already displayed on the display unit in response to a predetermined input detected by the touch panel unit.