A knob for displaying a graphical user interface for use in controlling controllable parameters of an aircraft cabin, the knob comprising: a movable body portion; and a top surface on which is disposed a touch-sensitive display; wherein the knob: displays a menu of controllable parameters for the aircraft cabin on the touch-sensitive display, the menu of controllable parameters including a plurality of controllable parameters selected from a group comprising light intensity, light color, temperature, media type, media content, media volume, and the degree of openness of at least one window shade; receives an input of a selected controllable parameter from the menu of controllable parameters; displays a control for the selected controllable parameter; and receives a control input for the selected controllable parameter, the control input being received through one of movement of the body portion and through touch of the touch-sensitive display, the selected controllable parameter being adjusted consistently with the control input, wherein the knob is disposed on a side ledge of the aircraft cabin and has a retracted position and a deployed position, wherein, in the deployed position, the top surface of the knob is above a surface of the side ledge of the aircraft, and wherein the knob is responsive to touch of the touch sensitive display for transitioning by a powered device between the retracted position and the deployed position. a movable body portion; and a top surface on which is disposed a touch-sensitive display; wherein the knob: displays a menu of controllable parameters for the aircraft cabin on the touch-sensitive display, the menu of controllable parameters including a plurality of controllable parameters selected from a group comprising light intensity, light color, temperature, media type, media content, media volume, and the degree of openness of at least one window shade; receives an input of a selected controllable parameter from the menu of controllable parameters; displays a control for the selected controllable parameter; and receives a control input for the selected controllable parameter, the control input being received through one of movement of the body portion and through touch of the touch-sensitive display, the selected controllable parameter being adjusted consistently with the control input, wherein the knob is disposed on a side ledge of the aircraft cabin and has a retracted position and a deployed position, wherein, in the deployed position, the top surface of the knob is above a surface of the side ledge of the aircraft, and wherein the knob is responsive to touch of the touch sensitive display for transitioning by a powered device between the retracted position and the deployed position. displays a menu of controllable parameters for the aircraft cabin on the touch-sensitive display, the menu of controllable parameters including a plurality of controllable parameters selected from a group comprising light intensity, light color, temperature, media type, media content, media volume, and the degree of openness of at least one window shade; receives an input of a selected controllable parameter from the menu of controllable parameters; displays a control for the selected controllable parameter; and receives a control input for the selected controllable parameter, the control input being received through one of movement of the body portion and through touch of the touch-sensitive display, the selected controllable parameter being adjusted consistently with the control input, wherein the knob is disposed on a side ledge of the aircraft cabin and has a retracted position and a deployed position, wherein, in the deployed position, the top surface of the knob is above a surface of the side ledge of the aircraft, and wherein the knob is responsive to touch of the touch sensitive display for transitioning by a powered device between the retracted position and the deployed position.