Reversing Color Band

I am having hell of a time trying to reverse Color Band setting; here I want to put the cyan color to the left of dotted line. Some times band can reverse when sliding the dotted line all the way to the left and back. That may do or may not?! So, I fuss with it for 5 min! I need the definitive way to control it. Anyone know?


Man, its so simple. Thanks Richard.