# Using custom fields

Each site that is built on the DevHub platform can be assigned custom field values that can then be used throughout templates and pages.

### Example custom field values

Below is an example of some assigned fields.

```javascript
"custom_fields": {
  "headline_one": "Example headline one",
  "headline_two": "Example headline two"
}
```

## Using custom fields in templates

Using our standard templating language, you can access the Site's custom fields and output them inside templates.

```markup
<h1>{{ site.custom_fields.headline_one }}</h1>
<h2>{{ site.custom_fields.headline_two }}</h2>
```


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# Agent Instructions: Querying This Documentation

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

```
GET https://docs.devhub.com/themes-and-custom-templates/using-custom-fields.md?ask=<question>
```

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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.