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 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:

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

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

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