> For the complete documentation index, see [llms.txt](https://support.skylum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.skylum.com/luminar-for-web/how-to-use-luminar-for-web/editing-tools/develop/curves.md).

# Curves

Learn how to enhance the fine details and textures of your photos with Structure AI, adding depth and clarity while avoiding over-sharpening or unnatural effects.

**Curves** gives you precise control over the brightness, contrast, and color balance of your photo. Adjust the curve across all color channels at once or work with individual red, green, and blue channels for more targeted corrections.

{% embed url="<https://app.arcade.software/share/EfhY0J9PAItyUQeuflJb>" %}

**How to Use:** Select the Curves tool and choose the channel you want to adjust. Add control points to the curve and drag them to adjust brightness or color across different tonal ranges of the photo.

* **Color Channels.** Select the white channel to adjust the overall tonal range, or choose the red, green, or blue channel to fine-tune individual colors.
* **Control Points.** Add up to 10 control points along the curve to target different tonal ranges. Moving a point upward brightens the selected range, while moving it downward darkens it. Use multiple points for more precise adjustments.

**When to Use:** Ideal for fine-tuning contrast and tonal balance, creating precise brightness adjustments, or correcting and stylizing individual color channels.

{% hint style="success" icon="circle-info" %}
**Pro Tip:** A gentle S-curve can add contrast by slightly darkening darker tones and lifting brighter tones. Small adjustments are usually enough. Large curve changes can quickly remove highlight or shadow detail.
{% endhint %}


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