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Chapter 5. Color Settings: Configuring P... > Choosing a Gray Working Space - Pg. 164

Color Settings: Configuring Photoshop's Color Settings ded folder. In Windows, it's inside the Program Files/Common Files/Adobe/Color/Profiles/ Recommended folder. This lets you access your favorite profiles without having to keep Advanced Mode turned on, so you don't have to wade through the entire list of profiles installed on your system, or deal with all the Advanced Mode controls. 164 Choosing a Gray Working Space Grayscale is a first-class citizen in Photoshop CS, with its own profiles independent of RGB or CMYK. However, note that grayscale profiles only contain tone reproduction information; they have no information about the color of the black ink or of the paper. When Advanced Mode is turned off, you can choose among grayscale dot gains of 10, 15, 20, 25, or 30 percent, depending on your printing conditions. You can also choose either gamma 1.8 or 2.2, which are good choices for grayscale images destined for the screen. Of course, there's nothing to prevent you from using these gamma values for print images, or the dot gain curves for onscreen use, but generally speaking, gammas are designed for onscreen and dot gain curves are designed for print. Note that on the Macintosh platform, you can also choose the black channel of the Color- Sync Default Profile for CMYK Documents, which is particularly useful if you print grayscale and color images in the same job. Custom Gray When you check Advanced Mode, you gain access to all the grayscale profiles installed on your system, as well as the ability to define custom grayscale working spaces (which you can then save as Grayscale ICC profiles, if you want). Custom Dot Gain.If you print a lot of grayscale work on the same sort of paper stock, it may well