Okay, so you go through the expert mode and use the sliders and that determines the native gamma of the display. Then it suggests that you use a gamma of 2.2. What is the whole point of the going through all of those steps just to set the gamma at 2.2. Is there anything else that using the sliders and going through those steps does? I had previously assumed that the native gamma was like an absolute value, sort of like how a display has a contrast ratio defined from the factory, but I guess that is wrong. One other thing that I don't understand. A tutorial on using the display calibrator mentioned that you calibrate based on a profile that is the most closely related to your display. I had assumed that doing calibration was creating a totally new color profile. What influence does the base profile you select and then calibrate from have on the end result?