When in Songs list, across the bottom of the screen is an alphanumeric row. If you press and hold the right/left button, a cursor moves along the alphanumeric row and the list jumps to the first song of the selected letter when you let go.
Does that make sense?
P.S. I’d also like to see ALL lists loop, so that if I go backwards from the first slot, it goes to the end of the list.