Just got a new Dell U3011, which has Gain and Offset controls for RGB. The default for Gain is 100%. When I calibrated with Spyder 4 Pro, I had to reduce the blue and green just a bit, but that did the trick.
When it came to brightness which I wanted to set to 120, I started out with a default of 50%. Even when I reduced it to 0%, I could only get the brightness to 125. Should I just leave things there, or should I reduce each of the RGB's to 75% each, and then repeat the above. Will that allow me to reach a lower brightness of 120 or less?
And how do I use the Offset controls, or should I touch them?

