Photoshop's Variations adjustment gives you a look at how working with analogous and complimentary colors impacts the color in a Photoshop document. For example, if an image has an overall green cast, it needs additional magenta. Understanding how colors interact and work to produce different colors helps you decide the correct course of action to take, and the Variations adjustment is an excellent teacher.
Image menu, point to
Adjustments , and then click
Variations .
The Original and Current Pick are displayed in the upper-left portions of the Variations dialog box.
Original any time during the adjustment process.
Shadows, Midtones, Highlights , or
Saturation options to apply a color shift.
Fine/Coarse slider to determine how much change occurs with each adjustment.
Show Clipping check box to display a mask over areas of the image outside of the CMYK printable color space.
OK .