The project wide Kanban board is great, as are the sprint specific kanban boards. However having them separated makes it slightly difficult to maintain. We've been moving around this by using categories/ tags on tickets and then moving all tickets in that category into a sprint, but it feels a bit clumsy involving a number of screens, and makes managing the backlog more difficult than it could otherwise be.
What would be amazing would be the possibility of a single Kanban board where you could filter cards by which sprint they were in (similar to how you can with tags) and potentially move tickets between sprints. I think having a single screen for all the tickets within the project would be incredibly powerful.
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