Connect to SURFCAM. If the desired parameters for Stream/Undo have not been defined, set them in the Stream/Undo Settings dialog in the Options menu. To begin the digitizing session, select the Digitize menu item in SURFCAM. Position the digitizer tip at the first point of the desired stream, and press (hold down) the primary button. The first point will be digitized at that point. While the primary button is held down, move the digitizer tip towards the next desired point in the stream. When the specified distance has been traveled by the tip away from the previous point, the next point is digitized. This process of digitizing points at regular intervals continues until the primary button is released. To delete the final point in the stream, press the secondary button. The digitizing session is terminated when another menu item in SURFCAM is selected.