A flight guidance controller system, comprising: a flight guidance controller interface including a rotatable knob including a rotatable element disposed around a periphery of a touch control display; at least one processor in operable communication with the flight guidance controller interface, the at least one processor configured to execute program instructions, wherein the program instructions are configured to cause the at least one processor to: output a display on the touch control display including a plurality of sections (206A, 206B), the plurality of sections including an indication of respective functions of an automatic flight control system; receive a touch input to one of the plurality of sections, thereby activating control of a corresponding one of the respective functions of the automatic flight control system; receive a rotation input to the rotatable element, which provides information about a value for the corresponding one of the respective functions of the automatic flight control system; and output the information to the automatic flight control system so that the automatic flight control system can responsively set the corresponding one of the respective functions based on the value, wherein the rotatable knob has indexed positions distributed evenly throughout 360° of rotation, which are mechanically defined by an interface between a mount for the touch control display and the rotatable element, and wherein the program instructions are configured to cause the at least one processor to: receive a swipe input to the touch control display; and change a step size of the value per indexed position based on the swipe input. a flight guidance controller interface including a rotatable knob including a rotatable element disposed around a periphery of a touch control display; at least one processor in operable communication with the flight guidance controller interface, the at least one processor configured to execute program instructions, wherein the program instructions are configured to cause the at least one processor to: output a display on the touch control display including a plurality of sections (206A, 206B), the plurality of sections including an indication of respective functions of an automatic flight control system; receive a touch input to one of the plurality of sections, thereby activating control of a corresponding one of the respective functions of the automatic flight control system; receive a rotation input to the rotatable element, which provides information about a value for the corresponding one of the respective functions of the automatic flight control system; and output the information to the automatic flight control system so that the automatic flight control system can responsively set the corresponding one of the respective functions based on the value, wherein the rotatable knob has indexed positions distributed evenly throughout 360° of rotation, which are mechanically defined by an interface between a mount for the touch control display and the rotatable element, and wherein the program instructions are configured to cause the at least one processor to: receive a swipe input to the touch control display; and change a step size of the value per indexed position based on the swipe input. output a display on the touch control display including a plurality of sections (206A, 206B), the plurality of sections including an indication of respective functions of an automatic flight control system; receive a touch input to one of the plurality of sections, thereby activating control of a corresponding one of the respective functions of the automatic flight control system; receive a rotation input to the rotatable element, which provides information about a value for the corresponding one of the respective functions of the automatic flight control system; and output the information to the automatic flight control system so that the automatic flight control system can responsively set the corresponding one of the respective functions based on the value, wherein the rotatable knob has indexed positions distributed evenly throughout 360° of rotation, which are mechanically defined by an interface between a mount for the touch control display and the rotatable element, and receive a swipe input to the touch control display; and change a step size of the value per indexed position based on the swipe input.