mark do open up a 700 page book read the first sentence and think you know what naw not for me i got this figured out. I own this mouse its the **** very good comfort. And if somebody where to say other wise then their doing something wrong this thing is like a lego set you can mix and match just about anything, and the sniper button straight genuis really dont know why more mouse's dont have it on theirs, and thats why this rat 7 is a cut above.