Ignition dwell and adjusting it.

I have a multimeter that I think has a dwell selection on it. Is that all that's necessary? I also have feeler gauges. I'll set it with those and then check it with a meter for the sake of learning how. If there is in fact a specific ignition dwell meter needed. Can I get a decent one at Oreillys or Autozone?
I doubt your volt meter has a dwell meter. Since the use of points has all but disappeared, finding a new dwell meter may not be easy. Flea markets or swap meets is where I see them the most now days.