Adobe Photoshop CC 2014 v.14.xx - Manual (Page 372)

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Grayscale
Black Matte
White Matte
Quick Mask
Sampling color
To adjust the selection:
To add colors, select the plus eyedropper, and click in the preview area or image.
To remove colors, select the minus eyedropper, and click in the preview area or image.
To activate the plus eyedropper temporarily, hold down Shift. Hold down Alt (Windows) or Option (Mac OS) to activate the minus
eyedropper.
5. Adjust the range of colors selected using the Fuzziness slider or by entering a value. The Fuzziness setting controls how wide a range of
colors is in the selection, and increases or decreases the amount of partially selected pixels (gray areas in the selection preview). Set a low
Fuzziness value to restrict the color range, a higher value to increase the range.
Increasing fuzziness expands selection
If you selected Localized Color Clusters, use the Range slider to control how far or near a color must be from the sample points to be
included in the selection. For example, your image contains a patch of yellow flowers in both the foreground and the background, but you
want to select just the foreground flowers. Sample the colors in the foreground flowers and reduce the Range so that the similarly colored
flowers in the background are not selected.
6. To preview the selection in the image window, choose a Selection Preview option:
Shows the original image.
shows white for completely selected pixels, gray for partially selected ones, and black for unselected ones.
Shows the original image for selected pixels, and black for unselected ones. This option is good for bright images.
Shows the original image for selected pixels, and white for unselected ones. This option is good for dark images.
shows unselected areas as a rubylith overlay (or a custom color you’ve specified in the Quick Mask Options dialog box).
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