Exchange the functions of the main and sub command dials. If On the sub-command dial controls the shutter speed and the main command dial controls the aperture . If Off then the sub-command dial controls the aperture and the main command dial controls the shutter speed.
If On(Mode A) is selected then the main command dial sets the aperture in Aperture Preferred Exposure Node. (Applies to D3S, D3, D300, D700, D7000)
Supported only on D200, D3, D3S, D3X, D300, D700, D7000, D80, and D90.
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