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Changing Color Modes

Before converting your file to a different color mode, it’s a good idea to save a “master” version of your photo first. That way, no matter what changes you make to your image, you always have an untouched backup version, just in case.

To convert an image to grayscale:

1.
From the Image menu, select Mode > Grayscale (Figure 3.5).

Figure 3.5. Choose Image > Mode > grayscale to convert an RGB image to grayscale. A Grayscale image is only about 1/3 the size of a RGB image.


A message appears asking “Discard color information?”

2.
Click OK (Figure 3.6).

Figure 3.6. In order to convert from RGB to grayscale, you will discard the color information. Save a separate color version of your image to preserve colors.


The conversion discards all color information, resulting in an image with up to 256 shades of gray. (See the color plate section of this book for a full-color example.)


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