> For the complete documentation index, see [llms.txt](https://boundbyoath-bbo.gitbook.io/animation-composer-system-acs-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://boundbyoath-bbo.gitbook.io/animation-composer-system-acs-documentation/outline/quickstart-1.md).

# Styling the AnimComposer Editor.

The **AnimComposer** custom editor gives you direct access to all its **visual elements** and **style sheets**, making it easy to modify the interface.\
To begin editing, simply select the file **`AnimComposerEditor (Visual Tree Asset)`**.

If you’d like to learn more about how Unity’s **UI Toolkit** works — including how to style visual elements — check out Unity’s official [**UI Toolkit E-book**](https://unity.com/es/resources/scalable-performant-ui-uitoolkit-unity-6).

Prefer learning through video? There’s also a helpful video tutorial that explains [**UI Toolkit**](https://unity.com/es/resources/scalable-performant-ui-uitoolkit-unity-6) in the context of custom editors.

***

Because this is a fairly deep topic, we won’t cover every detail of how the system works here.\
Instead, we’ll focus on a few simple visual modifications, all performed intuitively through the UI Builder Asset.

{% hint style="info" %}
You can also modify the **.UXML** files to adjust the **editor’s layout and structure**, or the **.USS** style sheets to change the **visual appearance and aesthetics**.
{% endhint %}

<figure><img src="https://3643221000-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOonWvHFQUDRtnFYUlNna%2Fuploads%2FQQk0LQrr6bPfnvQStZ8B%2FModifyingButtonColor.gif?alt=media&amp;token=8887eff0-efc4-4b1e-be67-a20dc26de9cd" alt=""><figcaption><p>Modifying the base button color by selecting and editing the <code>.CustomButton</code> style class.</p></figcaption></figure>

***

<figure><img src="https://3643221000-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOonWvHFQUDRtnFYUlNna%2Fuploads%2FtZoN45uLCojSDMG8v97f%2FModifyingAnimPreviewBorder.gif?alt=media&amp;token=87d13629-8397-4337-a018-32ca3eb781bc" alt=""><figcaption><p>Changing the Animation Preview Window border color by selecting and editing the Visual Element.</p></figcaption></figure>

***

<figure><img src="https://3643221000-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOonWvHFQUDRtnFYUlNna%2Fuploads%2F0R6H9aPIBfGwCMJoaQfG%2FModifyingActionBlocks.gif?alt=media&amp;token=7d446f97-c071-4260-b67a-d1487e068df0" alt=""><figcaption><p>hanging the ActionBlocks border by editing the <code>.action-block</code> style class.</p></figcaption></figure>

***

I’m showing only simple examples here, but the styling possibilities go far beyond color or border width. You can modify almost any aspect of the interface — even the layout and distribution of certain elements.

Keep in mind, however, that **`AnimationPreviewInspector.cs`** binds functionality to specific visual elements. For these to work correctly, their **assigned names must remain unchanged**.

You can also modify the **`AnimationPreviewInspector.cs`** script itself to extend functionality, though it’s strongly recommended to **back up the default version first**.

***


---

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