Adobe 29180155 User Guide - Page 133

ADOBE PHOTOSHOP ELEMENTS 4.0 128 User Guide A B C How to read a histogram A. Overexposed photo B. Properly exposed photo with full tonality C. Underexposed photo See also "About camera raw image files" on page 73 "Using the histogram and RGB values in camera raw" on page 76 To view a histogram 1 If the Histogram palette is not open in the Editor or the Palette Bin, choose Window > Histogram. 2 Choose the source of the histogram's display from the Source menu: Entire Image Displays a histogram of the entire image, including all layers in the multilayered document. Selected Layer Displays a histogram of the selected layer in the Layers palette. Adjustment Composite Displays a histogram of an adjustment layer selected in the Layers palette, including all the layers below the adjustment layer. 3 To view the histogram for a portion of your image, make a selection in your image. 4 Choose an option from the Channel menu: RGB Displays a histogram that is a composite of individual color channels placed on top of each other. Red, Green, and Blue Display the histograms for the individual color channels. Luminosity Displays a histogram representing the luminance or intensity values of the composite channel. Colors Displays the composite RGB histogram individually by color. Red, green, and blue represent the pixels in those channels. Cyan, magenta, and yellow represent where the histograms of two channels overlap. Gray represents areas where all three color channel histograms overlap.