When To-Do list is not needed anymore, it is possible to archive it. Archived To-Do list can be restored anytime, including the entire history. Feature Archive is available for each To-Do list. In case you want to delete a To-Do list you have to archive it first.
Archive To-Do list
Every user invited to a project with an access to To-Do list can archive it. Go to project detail and via three-dot menu next to the To-Do list name find the last option Archive To-Do list.
Right after archiving a To-Do list you can undo the action via orange notice at the bottom > click here.
How to restore archived To-Do list
All the archived To-Do list are at the end of To-Do list section under a title Archived To-Do lists. You can restore the list anytime and all the details maintain.
Click the To-Do list name. You can check all the tasks and also decide whether you want to restore or delete the To-Do list.
Delete To-Do list
Only archived To-Do list can be deleted. After the archiving To-Do list it can be restored or deleted definitely.
First archive the To-Do list as described above. Then go to the section Archived To-Do lists and click the To-Do list name. In the red upper row click on delete it permanently.
In the following window confirm the action via Delete or Cancel.