Adobe 65007312 User Guide - Page 113
Make adjustments to the tone curve, Change curve areas affected by Region sliders
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USING PHOTOSHOP LIGHTROOM 2 108 Developing photos Develop module Tone Curve panel If a point on the curve moves up, it becomes a lighter tone; if it moves down, it becomes darker. A straight, 45-degree line indicates no changes to the tonal scale: The original input values exactly match the output values. You may see a tone curve that isn't straight when you first view a photo that you haven't adjusted. This initial curve reflects default adjustments that Lightroom applied to your photo during import. Use the Tone Curve panel to adjust the values in specific tonal ranges in the image. For example, if you want to see greater separation of tones in the midtones, you add contrast by moving the dark tones down the graph and making them darker, and moving the light tones up to make them lighter. The slope of the tone curve becomes greater, indicating increased contrast in that tonal range. Make adjustments to the tone curve You make tone curve adjustments directly on the curve or using the Region sliders in the Tone Curve panel. The areas of the curve affected by the sliders depend on where you set the split controls at the bottom of the graph. The middle region sliders (Darks and Lights) affect the larger midregion of the curve. The Highlight and Shadows sliders affect mainly the ends of the tonal range. • In the Tone Curve panel of the Develop module, drag the Region sliders. As you drag, the area of the curve affected by the slider is highlighted. You can expand or contract the curve regions that the sliders affect (see below). • Click a point on the curve and drag it up or down. As you drag the point, the area of the curve affected is highlighted and the related slider moves. The original and new tonal values are displayed in the upper-left of the tone curve. • Choose an option from the Point Curve menu. The setting you choose is reflected in the curve but not in the region sliders. Medium Contrast is the default Point Curve setting. The Point Curve option is blank for photos imported with metadata and previously edited with the Adobe Camera Raw tone curve. The curve itself will reflect any custom edits. • Click the Targeted Adjustment tool in the upper-left of the Tone Curve panel, move the pointer over an area in the photo that you want to adjust, and then click the mouse. Drag the pointer, or press the Up and Down Arrow keys to lighten or darken the values for all similar tones in the photo. Change curve areas affected by Region sliders ❖ Drag the split controls at the bottom of the tone curve graph. Updated 03 September 2009