> For the complete documentation index, see [llms.txt](https://astra-image.gitbook.io/astra-image-6.0/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://astra-image.gitbook.io/astra-image-6.0/adjustment-tools/introduction-to-adjustment-tools.md).

# Introduction to Adjustment Tools

The Adjustment tools give you control over the brightness, contrast and color in your image. They are non-destructive, meaning that they won't be permanently applied to the image until you click the 'Apply' button (so if you save the image without clicking 'Apply', the saved image will not have been modified).

<div align="center"><figure><img src="/files/eYOgGlUF8oxb8HAuw78e" alt="The adjustments panel"><figcaption><p>The Adjustments panel.</p></figcaption></figure></div>

1: This panel contains the 'Apply' button and the color space buttons. When 'Apply' is clicked, the adjustments are committed to the image permanently. If you are using a GPU or OpenCL for processing, you can choose to make the adjustments in either Lab or RGB color space. If you don't have any hardware acceleration, only RGB color space will be available.

2: The Light panel has adjustments that change the brightness and contrast.

3: The Color panel lets you change the colors.

4: The Contrast panel has fine-grained contrast adjustments where contrast can be adjusted in the shadows, midtones and/or highlights.

5: The Curves panel lets you set the intensity curve. Creating a custom intensity curve is a powerful tool for extract the most from your images.