Systems and methods for receiving, processing and responding to text messages are described. The setpoint monitor receives setpoint modifications, each setpoint modification corresponding to a modification of one of the setpoint values. The apparatus only needs one set of grayscale voltage so that the layout area of the apparatus, and the flicker and the residual images of the display panel can be reduced. The garment hanger also includes locking tabs formed on the main body of the garment hanger which engage the folded arms, and function to retain the folded garment and arms in a folded shape which is suitable for retail display and merchandising of the apparel. The desired value for the force acting on the piston in the axial direction and its actual value are used to form a control difference which controls one of the force components acting on the machine part in the axial direction. Other aspects are described and claimed.