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Q&A

Q1:Levels and Curves seem to do more or less the same thing. How do you know which to use?
A1: If the picture seems to have the right color balance (not too red, green, and so on) but is too dark or light, use Levels. If the colors aren't right, adjust the Curves for individual colors and for the RGB (full spectrum) channel.
Q2:I have a sepia tinted photo (brown tones) that I have scanned into the computer, but the scan came out yellow. Is there a way to get rid of the yellow cast without losing the sepia?
A2: The easy way is to convert it to grayscale, so you get rid of all the color. Then convert it back to RGB. Open the Image, Adjust, Curves dialog box. Instead of RGB on the Channels pop-up menu, select red and drag the curve up until you have added an appropriate amount of red. Then set the pop-up menu to green and drag the curve down until you have added enough of that color. Finally, set the pop-up menu to blue and drag down until you have removed the blue and achieved a reasonable sepia. Experiment until you get the color you want, and then click OK.
Q3:If the picture's going to be printed in black and white for a newsletter, do I really need to adjust the color balance and stuff?
A3: Always leave your options open. Adjust a copy of the picture in Grayscale mode, just to make sure the contrast is good for reproduction. For that, you don't need to think about color. But, keep a copy in color in case you want to put the same picture on a Web page or do something else with it later.


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