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I understand that you would like to customize the card's layout of business projects (JIRA Core), adding or removing fields like in the screenshot below. Is it correct?
If I have properly understood your question, JIRA Core template was created for business teams which requested a simpler board with fewer options of customization, avoiding the complexity of JIRA Software template.
That been said, the ability to edit card layout is only available for JIRA Software projects, however, we have a feature request opened to implement a default kanban board to business projects with all the customization options:
Feel free to vote and watch the suggestion to increase its priority and also receive notifications about any updates.
For now, the only way to achieve this would be by using JIRA Software projects.
Let us know if we have properly understood your question.
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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