# Medias

Castmill support most media types out there for images, videos, pdfs and audio files. All medias are handled in the Medias tab, where you can upload, preview and organize them.

{% hint style="info" %}
If you find a media file that is not compatible with Castmill, please [contact us](/getting-started/support.md) since we are always adding new formats by request.
{% endhint %}

The first time you enter Castmill it will appear empty until you start uploading content:

![The medias page](/files/-M_PfFFFfB9mzEvS0bWp)

Just click on "Update Medias" to upload the content you want. A dialog will open and you can choose as many media files as you want in one go:

![](/files/-M_Q-Udp-niBR8qL-xaC)

![](/files/-M_Q-9ZBMncaZOkrKkZj)

Click OK and now you can see the list of files ready to upload:

![](/files/-M_Q-g8ZhHQbkwCHwGlI)

The files will upload as soon as you click the "Upload" button:

![](/files/-M_Q-t8e3D1eKJ3MG9a-)


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.castmill.com/content/uploading-content.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.