Select a photo to open it in Detail view.
Last updated on
Jun 5, 2026
Learn how to use the tone Curve graph to adjust color channels and create custom tonal adjustments in your photos.
Use Curve when you need granular control over specific tonal ranges in your photo. The Curve graph maps original tone values (input) to adjusted tone values (output), letting you target highlights, midtones, and shadows independently. For broader tonal adjustments, use the basic Light panel sliders first.
Access and adjust the Point Curve
Select Edit > Light .
Select Curve to display the tone curve graph overlaid on your photo.
In the Curve panel, do one of the following:
- Select Red Channel, Green Channel, or Blue Channel icons to adjust a single color channel.
- Select White Channel to adjust all three channels simultaneously.
Select anywhere on the curve line to add an adjustment point.
Drag the point up to brighten that tonal range or down to darken it.
Add additional points as needed to refine different tonal ranges in your photo.
Double-tap any point on the curve to remove it.
Select DONE to save your settings.
Access and adjust the Parametric Curve
Select a photo to open it in Detail view.
Select Edit > Light .
Select Curve to display the tone curve graph overlaid on your photo.
In the Curve panel, select the Parametric Curve icon.
To adjust tonal values, do one of the following:
- Hold and drag the curve up or down to adjust Highlights, Lights, Darks, and Shadows in your photo.
- Use the Curve slider that represents original tone values, with black on the left progressing to white on the right. Drag the point right to brighten the tonal range or left to darken it.
Select DONE to save your settings.
Tip
Observe the histogram as you adjust Curve points to monitor how changes affect the tonal distribution across your photo. To view the histogram, select Edit > Light, and then toggle on Edit in HDR mode.
