>>590
I know it says earth element if you search online, but they're traditionally used for different things. I usually go through all fingers one at a time for the basic mudras:
(join with thumb)
little finger, bhudy mudra, intuition
ring finger, prithvi mudra, self awareness
middle finger, shuni mudra, awareness in the moment
index finger, gyan mudra, concentration
You can try them and feel your mind change as you change position, it's pretty simple. I also use some other but these are the simplest.