What do you mean with "or the scroll whell" ?There is no dedicated button for cycling through DPI settings. You have to sacrfiface one of the thumb buttons. (or the scroll wheel possibly)
Thanks I was wondering about this also. Just purchased a DA Chroma.What scroll the wheel means is you can change the button assignment in your Razer software to allow you to "while you middle mouse button is pushed down + scrolling down or up to either raise your dpi or lower your dpi"