The team might discover that subtask is too complex during its development. That it is more user story than subtask.
In such situation, it is possible to convert it to backlog item by one click in the side view.
To convert task:
- Click subtask card in WORK view.
- Task details should be displayed on the right side.
- Click bulb icon to convert task.
- The new story will be assigned to the same sprint and selected once created.