Epson Stylus Color 900 Manual page 41

Advanced Printing
6 If you want to specify individual color correction values, use the sliders
to increase (drag right) or decrease (drag left) the settings listed below:
Brightness
Makes your image lighter or darker.
Contrast
Increases or decreases the difference between the bright or dark
parts of an image.
Saturation
Makes colors more vivid or less vivid.
Cyan, Magenta, Yellow
Increases or decreases the amount of the three ink colors that
combine to make a full-color printout. Use these sliders to fine-tune
the color balance in your printout.
7 Click OK to return to the printer settings dialog box.
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