"MENU" button --> SHOOTING MENU --> Set Picture Control --> Select "Standard" or whichever you use and press RIGHT arrow (not OK button!) --> Go down to Saturation, change and save preset by pressing the OK button.
If you want the most saturated color, start with vivid preset, and crank that saturation up, it might be overdoing it depending on the look you're trying to achieve.
I think the most flexible preset is Neutral with a lil less contrast (to adjust contrast/brightness, D-lighting has to be turned off) so the blacks aren't crushed from the get go (likelyhood is you will crush the blacks from all the compression).
Thanks, and how about the Nikon D2X? I went to look for the saturation levels for this camera as the same place for the D90 and I didn't find the saturation controls. I would assume that this camera (since it's full frame) would have control for saturation when the D90 is consider a lower end model compared to the D2X. Just wondering why that is the case
That's how it is with technology in general, newer model may inherit the functions of its preceders, while also getting some new gimmick and at a lower price point; moving lower down the food chain. I don't know but it's possible that the D2X have it hidden in a different place. It shouldn't be a problem at all for you if you're shooting RAW as all the camera's picture control settings aren't read out in ACR or Lightroom (they are in e.g. Capture NX, but you can still override them in post).
Most RAW converters just don't read the camera settings saved within the NEF file and instead apply settings what they have as default; their own brightness, contrast, saturation, curve and color profile; all which can be later changed by you.
Try this; set your camera's "picture control" setting to black-n-white and take a picture in RAW (NEF). When you then try to open it in ACR you should still get a standard color picture because your RAW converter ignores the BW setting stored within the RAW file (exception Capture NX, View NX etc. which reapply the BW setting upon loading the RAW picture).
If you on the other hand take a black-n-white picture as a JPG the colors are lost forever. The picture control setting is then applied to the picture before conversion to JPG, and the RAW is later tossed away.
If you feel that it's still too confusing, you can always donate your D2X to me I'd be more than happy to use its full potential.