Adjusting Tone Curves
In the Develop Tools pane, use the Tone Curves tool to change the tonal range of an image. Select the RGB color channel to adjust the entire range of the image, or select a specific color.
Settings can be set as a preset for future use.
To adjust the brightness curves in an image:
- In the Develop Tools pane, select the Tune tab.
- In the Tone Curves group, adjust the curves as described below.
Right-click the number field or the arrow for Blacks, Midtones, or Whites to reset it to the default setting. Or, double-click the number field or on the arrows to use automatic settings.
Tone Curves Options
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Curve |
Select a curve to apply to an image. Standard curve is the default. Use Camera to use the curve generated by Gemstone to produce a curve suitable for the image. The Curve drop-down list is only available for RAW files. |
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Channel |
Specify the color channels to adjust. |
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Histogram |
Displays a graphic of the color information levels in the image, based on the selected channel. Click and drag the line to manipulate the curve. Each time the curve is clicked, a new point is added. Drag the points up and down the curve. To delete a point, right-click it and choose Delete point. Or, delete a point by dragging it off of the top or the bottom of the graph. |
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Blacks |
Click and drag the black triangle or click it to automatically set the black point. Or, enter a number into the fields or use the up or down arrow buttons to set an exact black point. |
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Midtones |
Click and drag the gray triangle or click it to automatically set the midtone point. Or, enter a number into the fields or use the up or down arrow buttons to set an exact midtone point. |
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Whites |
Click and drag the white triangle or click it to automatically set the white point. Or, enter a number into the fields or use the up or down arrow buttons to set an exact white point. |
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Auto |
Automatically sets the points for blacks, midtones, and whites. |
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Color Picker |
A color picker is available when a point is selected on the histogram curve and the cursor dragged onto the image. |