# How to configure and use Card Custom Attributes

Custom attributes can be used as additional fields of card. You can use them in [merge fields](/standard-kanban/tools/using-merge-field-picker.md) in any place where card is available as context object ($Card).

Go to "**Custom Attributes**" section of card properties at the right sidebar. Click "**add**" link, fill in field Name and Value:

<img src="/files/JQTpzl9WkLtOXGM5JLZy" alt="" class="gitbook-drawing">

You can add any number of custom attributes with unique names:

<figure><img src="/files/HS1qiD0AuHVZd1EWKGK9" alt=""><figcaption></figcaption></figure>

Save current dashboard. After saving custom attributes will be available for current card context object:

<img src="/files/9bkiulnewPsgImudTTnV" alt="" class="gitbook-drawing">

Custom attributes should have `a__` prefix to be used in merge fields:

<figure><img src="/files/NIYx5DbATZjOhr8jt67H" alt=""><figcaption></figcaption></figure>


---

# 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.flexikanban.ai/standard-kanban/configure-card/how-to-configure-and-use-card-custom-attributes.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.