By Michael Henriksen When retouching pictures you should first address white balance and contrast. White balance is normally what one would consider first, then contrast.This order is important, because you can not set color contrast properly if the image has a color cast. White balance deals with the color of the illumination in the photo and normally has white as a goal. White balance apps attempt to retouch the hue of the illumination to neutral and to do that, the program normally needs some neutrals in the picture to calculate the correct filter tone from. For the whites one can use a piece of paper or a white wall or a dedicated white card. The grays are more difficult to find in real life, so one can use a dedicated gray card. White balance software comes in two varieties: automatic and manual. Manual correction comes as a temperature slider, which is fine for incandescent light, but not for fluorescent light or mixed light. When converting RAW images, one usually ha...