Guide

1. Navigate to Apps from the nav bar. (under More)

2. Click on Explore more apps to go to the app store.

3. Search for Checklists in the search bar. Also make sure to turn on the Free for all items checkbox.

4. Select one of the apps.

5. And install the app.

6. Head back to the Backlog and open any issue/card.

7. Scroll down and find the checklist app section.

8. Add your checklist items within the Checklist section.

9. And that's how your checklists items are added.