Apple MB673Z/A User Manual - Page 331
Choosing a Histogram View for Adjustments, Showing Additional Adjustment Controls
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III Choosing a Histogram View for Adjustments When you show the Adjustments inspector or the Adjustments pane of the Inspector HUD, a histogram of the selected image's luminance or color channels appears. The histogram displays a graph of the brightness values in the image, from the blackest point to the whitest point. You can adjust the histogram to show luminance; red, green, and blue (RGB) channels displayed together; or separate red, green, and blue channels. To choose a histogram view: m Choose a view option from the Histogram Options section of the Adjustment Action pop-up menu. Note: The histogram updates in real time in the Viewer and in Full Screen view, but it is slightly delayed in the Book Layout Editor, the Webpage Editor, and the Light Table. For more information about how to interpret a histogram, see "Understanding How to Read Histograms" on page 360. Showing Additional Adjustment Controls The first time you show either the Adjustments inspector or the Adjustments pane of the Inspector HUD, only the White Balance, Exposure, Levels, Highlights & Shadows, and Color adjustments are available. To add additional adjustments: m Choose a type of adjustment from the Add Adjustments pop-up menu at the top of either the Adjustments inspector or the Adjustments pane of the Inspector HUD. Add Adjustments pop-up menu The new adjustment appears highlighted in both the Adjustments inspector and the Adjustments pane of the Inspector HUD, if both are shown. Chapter 14 An Overview of Image Adjustments 331
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