Oh, I'm sorry, I did not recognize that you are using Jira Core.
Yes, i think that is the reason why you can't add fields to your cards. I didn't find this option reading the documentation for Core Boards (https://confluence.atlassian.com/jiracorecloud/working-with-boards-800712866.html)
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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