# Curves

The Curves adjustment allows you to precisely adjust the tonal range in your image. By left-clicking on the curves chart, you can add control points that can be dragged using the mouse. The x-axis of the chart represents input values, while the y-axis represents output values. Therefore, adjusting the curve in the bottom-left of the chart affects darker areas, and adjusting the curve in the upper-right affects brighter areas.

**Mouse Controls**\
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**Left-click**\
this will add a control point\
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**Right-click (while hovering over a control point)**\
this will delete the control point.

<div align="left"><figure><img src="https://642819126-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLBlqtJBdFJ4rkIvhdwcZ%2Fuploads%2FfLrGX3hXdvKjWKKWLE2r%2Fcurves.png?alt=media&#x26;token=305c1908-a045-496c-8904-d67b5f19f599" alt="The Curves adjustment panel."><figcaption><p>The Curves adjustment panel.</p></figcaption></figure></div>

When processing in RGB color space, the individual red, green and blue channels can have independent curves. When in Lab color space, only the luminance can be adjusted.