1. Configure checklist at project level.
2. Choose which checklist should be visible at project level.
3. Mark which checklist questions is mandatory or optional.
4. Use the workflow function to validate if all the checklist items were completed before transitioning an issue by defining checklist condition e.g. when all mandate to-do items checked then only allow to mark task DONE.
5. Include selected checklist to your issue/task.
6. You can define your project checklist offline using excel. Export default checklist in excel and do editing and import your saved checklist excel file.