Completed tasks can be moved to Archive from the Workflow board or by using
Actions button in the task window. It is a convenient method of keeping history of tasks as well as a reference to restore any archived tasks.
You can always restore tasks from the archive in case of a necessity. Simply click on
Restore button in the specific task window.
Or use the mass restore for tasks by using
Actions button in the archive list:
The list of archived tasks can be filtered by Project or Partners: