Finger dancing basics?

Have been away from FOTMD a bunch lately, but notice Finger Dancing mentioned in passing on some recent discussions. Ever since I discovered this was a style I was using, I've prowled the Search feature here, hoping to learn more. Not much said unfortunately.

Would really appreciate learning more about the style. (It seems like all other styles get their own group while Finger Dancing gets barely a glance.)

I wouldespecially love more said about switching to middle and bass strings. So far I've tended to do that just to reach lower notes, but know from a few arrangements by Wanda Degan it can do more to enrich a piece.