On the front panel for the 480, the 4th button from the left adjusts the step size for the selector click knob. I found that if I press it once and touch the tuning knob, all of a sudden I have a nice slow tuning dial. I had the internal menu set to 250, and this combination was amazingly slow. I pushed the internal menu 3 up to 1000, and now I have a very nice tuning ratio. Press the button for a low beep and I can tune fast across a chunk of spectrum. Just tap the button rather than hold it in. I wonder if this works because it works, or if it relates to an internal menu setting? Others with the 480 can check it out. I wonder if the 570 and 590 behave in a similar manner? H T Kaufman MSW LCSW Adaptive Technology Instructor