Can anyone explain for me what these symbols mean?  In one set the fingers are parallel to the front wall, and in the other set they are parallel to the side wall and hit the front wall.  My problem is that I don’t know why the second column in each are half circles and which direction each one represents.  For example, is the first one in the second column  (S2f110)  representing the fingers moving in circles to the left and then down?

Thanks!

Rachel

Finger circles wall