Following the instruction given in this question, I calibrated my monitor meticulously so that it adopts the standard gamma correction across all platforms, e.g. Internet, Photography, etc.
Now what is the standard value of Gamma that I should set? If no standard is given, at least the widely used value that meets the demands of Photography. How about the monitor's setting? should I reset it to "Factory settings"? Or manually reset its RGB value and if yes, what are the ideal values?