Actors are programmed to move about the stage. The move method instructs an actor to travel a given number of pixels in its current direction. Movement is performed incrementally in steps whose size is controlled by an Actor's step size. The bigger the step size the faster the movement.

The applet below starts a series of Line actors ( see JavaSource) that move on a straight line. The actors differ aside from their coloring in their step size. The table under the applet shows the actor's setp sizes.