An apparatus including a touch screen is provided. The apparatus includes the touch screen to display a first window for executing a first application and a second window for executing a second application, and a controller to detect whether a display change event for changing a screen display occurs in at least one of the first window and the second window, and to analyze the display change event in order to rotate a display direction of the at least one of the first window and the second window in which the display change event occurs.