# How to use custom css section in the app?

This custom CSS modifies the appearance of the specific input field to which the changes are being applied in the app.

{% hint style="danger" %}
Write your custom css in curly brackets: { "your css code" }
{% endhint %}

Frequently used css codes: background-color, border-radius etc. For example:

```
{
    border-radius:10px;
}
```


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

```
GET https://minimateapps.gitbook.io/customfield/how-to.../how-to-use-custom-css-section-in-the-app.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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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.