Subtasks allow breaking down larger tasks into smaller, manageable pieces. You can create new subtasks or link existing tasks as subtasks.
To create a new subtask:


When a task description already lists what needs to be done, you can turn any part of it into a subtask:

A short single-line selection (for example, a list item) becomes the subtask title. A longer or multi-line selection is saved as the subtask description instead.
You stay on the parent task after creating, so you can keep selecting other lines to break the task down into more subtasks.
If a relevant task already exists and should be part of another task as a subtask:
Open the parent task to view its details.
Click the task menu button (⋮).
Choose "Link Subtask".

Use the search field to find and select the task you wish to link.

The selected task is now linked as a subtask.
To unlink a subtask from its parent:
Open the subtask to view its details.
Click the task menu button (⋮).
Choose "Unlink From Parent".

The task will be unlinked from its parent and will no longer be a subtask.
By default, subtasks show up as separate cards on the board. To keep them inside their parent task instead:
Click the Board View Settings button in the top bar.
Under Subtasks, enable Subtasks nested.

Parent tasks now show a subtasks bar with the number of subtasks. Click it to expand or collapse the subtasks right inside the parent card.

Each parent task remembers whether it is expanded or collapsed. Nested subtasks work in Board, List, and Gantt views, and you can still open, edit, and drag them like any other task.
To show subtasks as separate cards again, disable Subtasks nested. To hide subtasks from the board entirely, disable Display subtasks.