> For the complete documentation index, see [llms.txt](https://docs.flexikanban.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flexikanban.ai/standard-kanban/configure-column/how-to-set-and-use-column-custom-attributes.md).
# How to Set and Use Column Custom Attributes
Custom attributes can be used as additional custom fields of column. You can use them in merge fields in any place where column is available as context object ($Column, $SourceColumn, $TargetColumn).
Go to "Custom Attributes" section of column properties at the right sidebar. Click "add" link, fill in fields "Name" and "Value":
You can add any number of custom attributes with unique names:
{% hint style="danger" %}
* Merge fields are not allowed to be used in custom attributes - they will not be calculated and may cause errors.
* Custom Attribute name must not contain spaces, non-latin letters and special symbols
* Custom Attributes names must be unique at the same column
{% endhint %}
Save current dashboard. After saving custom attributes will be available for current column context object:
Custom attributes should have "a\_\_" prefix to be used in merge fields:
{% hint style="info" %}
By default, when you create a kanban in the wizard and turn on "Allow users to move cards between columns", an application adds a Custom Attribute with "setValueTo" name.
This attribute is used in the Action that is triggered by card movement
Values of this Attribute correspond to field values selected to add columns.
{% endhint %}
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## 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, and the optional `goal` query parameter:
```
GET https://docs.flexikanban.ai/standard-kanban/configure-column/how-to-set-and-use-column-custom-attributes.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
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.