> For the complete documentation index, see [llms.txt](https://help.pickzen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.pickzen.com/developers/developers-panel/javascript-customization.md).

# JavaScript customization

The behavior of each slide can be customized by JavaScript through the Developers panel under General Settings:

![](/files/xlmMgmmItRVizhGY3RsU)

{% hint style="info" %}
In case you need a fully tailored customization with an aesthetic and/or functionality quite different from that offered by the theme, we recommend using our Design System or our [SDK](/developers/sdk.md) instead.
{% endhint %}