A method for controlling a display device, comprising, executing a first application and displaying an execution screen of the first application on a display unit, wherein the display unit includes a first display area and a second display area, and the execution screen of the application is displayed in at least one of the first display area and the second display area; and displaying a history screen including history information of the first application, wherein the history information is set up based upon a display mode, wherein first history information is displayed when the display mode of the first application corresponds to a single area mode, second history information is displayed when the display mode of the first application corresponds to an expand area mode, wherein the first history information has a display property different from the display property of the second history information.