A first cabinet comprising a first display module and a second cabinet comprising a second display module are provided. A switching is allowed between: a first state in which the first cabinet is placed on top of the second display module and the first display module faces outside, and a second state in which the first cabinet and the second cabinet are arranged next to each other and the first display module and the second display module face outside. A first screen to be displayed by the first display module and a second screen to be displayed by the second display module are stored and a screen switching operation is detected. Displaying of the first screen on the first display module is canceled and the second screen is displayed on the first display module, when the screen switching operation is detected in the first state.