> For the complete documentation index, see [llms.txt](https://guide.prismlive.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.prismlive.com/mobile/guides/features/camera/using-chroma-key-background.md).

# Using Chroma-key Background

The chroma-key is one of the video synthesis technology, which uses the difference in color tone to include a specific image or video in the background. And it’s commonly used in many film shoots.

***

You can find the **Camera Chroma-Key** function by clicking the More-button located at the top left.

<figure><img src="/files/EajHRjaKVlSFxT5UAENW" alt="" width="375"><figcaption></figcaption></figure>

The chroma-key function can be activated or deactivated through the function’s **ON** / **OFF** button.

<figure><img src="/files/DLiWBbZYk73u1q7huCQh" alt=""><figcaption></figcaption></figure>

Select the target color with the **Color** button and adjust the range of colors with the **Similarity** button.

<figure><img src="/files/0sWPiDFh27HMq0Ad30Ql" alt=""><figcaption></figcaption></figure>

The **Sensitivity** button allows you to adjust the naturalness between the background and the object. Also, you can customize background with **BG** button. You can use images and videos from your device or select from a variety of images and videos provided by the PRISM app as the chroma-key background.

<figure><img src="/files/HQ9p5HibOwIZHydNHNJx" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/bbgLtEVmqwEdH8OsnFDI" alt=""><figcaption><p>You can use images and videos from your device as a chroma-key background.</p></figcaption></figure>

<figure><img src="/files/05shIb8szcLtYvmv5wjG" alt=""><figcaption><p>PRISM app provides a variety of images and videos that can be used as a chroma-key background.</p></figcaption></figure>

[Mobile](/mobile/overview.md), [Guides](/mobile/guides.md), [Features](/mobile/guides/features.md), [Camera](/mobile/guides/features/camera.md)


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