In Develop mode, you can 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.
You can save your options as a preset for future use.
To Adjust the Tone Curves in an Image:
In the Tone Curves group, adjust the curves as described below.
Tone Curves Options
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Channel: |
Specify the color channel to adjust. |
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Curve: |
A standard curve is the default. Click and drag the line to manipulate the curve. Each time you click the curve, a new node is added. You can drag the nodes up and down the curve. |
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Black Point: |
Click and drag the black triangle or click it to automatically set the black point. You can also enter a number into the fields or use the up or down arrow buttons to set an exact black point. |
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Gamma: |
Click and drag the gray triangle or click it to automatically set the gamma point. You can also enter a number into the fields or use the up or down arrow buttons to set an exact gamma point. |
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White Point: |
Click and drag the white triangle or click it to automatically set the white point. You can also enter a number into the fields or use the up or down arrow buttons to set an exact white point. |
You can reset your tone curves by clicking the reset button.