# 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](https://docs.flexikanban.ai/standard-kanban/tools/using-merge-field-picker) 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="https://3097383375-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FK2dgObBO5ydOH2ZXDJLa%2Fuploads%2F6MVWyItqvmOXYJ0twvUW%2Ffile.excalidraw.svg?alt=media&#x26;token=bcfa0c05-224a-4300-bb42-407147548c45" alt="" class="gitbook-drawing">

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

<figure><img src="https://3097383375-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FK2dgObBO5ydOH2ZXDJLa%2Fuploads%2FzJhomUvOWps6DzhzIyfk%2Fimage.png?alt=media&#x26;token=a8ea7973-2d16-419a-8dd1-eba21ea377d9" alt=""><figcaption></figcaption></figure>

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

<img src="https://3097383375-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FK2dgObBO5ydOH2ZXDJLa%2Fuploads%2FtzyoWOxSgIdHCyjWLGNX%2Ffile.excalidraw.svg?alt=media&#x26;token=fc16c8e7-6f97-4ac3-a6a1-2778c0df35d8" alt="" class="gitbook-drawing">

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

<figure><img src="https://3097383375-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FK2dgObBO5ydOH2ZXDJLa%2Fuploads%2FCxPgdP6H0ofgQBQg36bO%2Fimage.png?alt=media&#x26;token=4f636dbc-b05a-4e34-99b2-0f549bb846d7" alt=""><figcaption></figcaption></figure>