This feature allows you to complete checklist items automatically when a transition has occurred on an issue. For this to take place you will have to configure your project so the post function is executed after an issue is transitioned.
Adding the post function
Go to Project Settings > Workflows page
Click the edit/pencil icon on the selected workflow to enter the workflow’s edit mode
On the workflow edition page click on the Diagram button to switch to the diagram mode
On the diagram now opened, click on the transition arrow that you want the post function to be added. Then click on Post Functions link
The target transition is selected
On the transition edition page now opened, click on Add post function
A list of all post functions configured for the target transition
Check the post function named “Complete All Checklist Items” then click on Add button
The post-function is selected
On the next page, click on Add button. You can confirm the post function is configured on the next screen
You will then have to publish your draft Workflow for the changes to take place.
Publishing the draft workflow
Testing the feature
At first, we have an issue with a checklist that has unchecked items on it.
An issue with a checklist that has some unchecked items
After the needed transition is made all items on the issue checklist are checked.
In case there’s more than one checklist on the issue, the items of all the checklists will be checked.