One can zoom the display by using the dial box knob labeled ``zoom''. Again the null position of this knob is center or straight up. Turning this knob clockwise of center causes the display to increase in size producing a zoom-in effect. Turning this knob counterclockwise of center causes the display to decrease in size or zoom-out. Again, the further the ``zoom'' knob is turned from center, the faster the zooming will occur.