How to create custom picture control in Nikon d3100 dslr's? I have tried with my Nikon 3100 without success, I don't know how to do it.
Press the MENU button, select Set Picture Control, and press the > button. This displays a list of the default picture controls. Select one as a basis and press > to show modification options.
See page 95 of the manual that came with your camera (ahem) for more details.