Figure it out yourself XD EDIT: Since it's featured.. Move the bow around. Click down while over top of the thicker bits of the strings EDIT: Press 1 and click a string to make a sound 1 fullstep higher than the original string EDIT: Andddd last edit for now: Pressing 2 and 3 works on the A String (3rd string from the left)
I have not really added much but i have taken this idea from someone else but added things of my own. But if you are going to give any credit to this give most of it to the original designer.