A digital television includes a memory storing one or more applications; an interface to receive control signals; a display; and a controller to display an application execution screen of an application among the one or more applications, in response to receiving, via the interface, a first control signal, display a first menu including one or more icons related to the first control signal, in response to receiving, via the interface, a second control signal selecting an adding menu icon in the first menu, and receiving a third control signal selecting an icon included in the one or more icons in the first menu, display the selected icon and a left direction key and a right direction key around the selected icon with a second menu, and in response to receiving, via the interface, a fourth control signal, add the selected icon to the second menu.