**Range:**Increases or decreases the range of values in the matte. When the Position is moved to 50, the red flowers turn black. When the Position is at a value of 100, the red flowers are shown as white in the matte. In the flower image below, look at how the matte varies for different Position values in a red extraction. For a luminance matte, a Position value of 100 would make a white matte of the highlights and a value of 0 would make a white matte of the shadows. Position: Pinpoints the color values to be used in the matte. Using advanced image slicing algorithms, mattes are created using luminance, hue, saturation, average, red, green, blue, cyan, magenta, and yellow values. Wherever there is white in the matte is where the glow adjustment will occur.