M65 Vengeance

Ok, noobie question, but I can't for the life of me figure out how to change the scroll speed of my new M65 mouse.



Is it in the software where you select the middle button (scroll wheel) and then toggle it to "n" strokes or something?



Please advise, thanks!



p.s. (It sure has a nice feel to it, and am stoked to figure it out to use it!)