Often, workflows in Trello have a complicated structure that could benefit from an extra level of organization. For example, you might want to break up a task into smaller parts, divide it among multiple people, or simply list things you don’t want to forget. A checklist is the easiest way to track subtasks within a main task.
Add, assign and schedule subtasks
There are a number of ways how you can add new subtasks to cards.
- From the card editor. Open a card and click + Add subtask to add a new one.
Come up with a title, add a date range and assign a team member if needed.
- From the tasklist/board panel. Click on the icon on any card in a list.
Drag and drop the subtask to the timeline or calendar, stretch to change duration.
Otherwise, you can add dates and a member to a subtask manually.
- From the timeline or calendar. Click anywhere on the calendar or timeline where you’d like to add a new subtask. Select the Subtask card type. Choose a parent card, fix dates and assign a member if needed.
Create multiple sets of subtasks
You can add as many sets of subtasks as you’d like, and name them to your preference. Click on the 3-dot menu next to a previously created set of subtasks. Click +Add subtasks to add a new list of tasks.
If you don’t need to see subtasks on the calendar/timeline at the moment, click View to hide them.
You can manually change the order of your subtasks in the card editor of the parent card.
Manage subtask status
The number you see next to the icon on cards in the tasklist/board panel represents the number of incomplete subtasks. Click on the icon to expand the list of subtasks. You can mark a subtask complete or incomplete by hitting the corresponding checkbox.
It’s also possible to complete subtasks on the calendar/timeline or in the parent card.
To remove a subtask from the calendar, but keep it in a checklist, right-click on an item and choose Remove from calendar.
To permanently delete a subtask, select Delete. Alternatively, you can delete a subtask as well as a whole set of subtasks in a parent card.