# Preview files

When working with the contents of files on Nuvolos, most of the time you are interacting with them from a Nuvolos application. However, the Nuvolos Web UI supports direct interaction with certain file types.

## Edit files

Nuvolos allows editing simple text files via its Web UI, which means you can open many files without needing to start an application, such as

* Files containing plaintext data (.csv, ...)
* Plaintext files (.txt, .md, ...)
* Source code files (.py, .m, ...)

The extension of the file does not matter. To open files for edit, click of the file's name in the file navigator and select **Edit**. If you don't see the edit option, it means either the file is too large (> 1 MB) or contains data that cannot be decoded to UTF-8 characters.

## Preview files

There are a number of files that you can preview in read-only mode without starting an application:

* PDF files (.pdf)
* Notebook files (.ipynb)

To preview supported files, click on the file's name in the file navigator and select **View**. If you don't see the **View** option, it means previewing is not supported for that file type.


---

# 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.nuvolos.com/features/file-system-and-storage/preview-files.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.