I'm trying to tweak the picture on my new Dell widescreen computer monitor and adjust color and image settings, etc, but some of the menu options in the on-screen menu are greyed out and I can't make changes. I can't access Contrast, Auto Adjust, Sharpness, Position, and some others. I read somewhere that the nature of a DVI-D source is that you can't change some of these monitor settings, is that true? Seems strange I can't get to Auto Adjust, in particular.

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