... Indexed Color mode, Photoshop creates a color lookup table (CLUT) to store the image's color informa-tion. When a color in the image cannot be found in the lookup table, Photoshop substitutes ... you're planning on colorizing a grayscale image, you can increase your control of the image by creating a layer directly above the image layer, and painting in the new layer. Leave the blending ... images might seem the obvious reason to use the Grayscale color mode, the speed and power of Photoshop, combined with faster computer systems, has prompted most photo restorers to switch to...