According to an aspect, a mobile electronic device includes: a display unit, an operating unit, and a control unit. The display unit for displays a character input screen including a part of a plurality of soft key objects each associated with a process in a line. The operating unit receives input of an operation. Upon detecting a changing operation through the operating unit, the control unit changes arrangement of the soft key objects such that at least one of the soft key objects that has been displayed is not displayed and at least one of the soft key objects that has not been displayed is displayed.