When you’re finished with a task, you can click the checkbox (to the left of the task name) to complete it.
Once you do, a check mark will appear, the task name will grey out, and the task will disappear from the active list. Even though it’s no longer active, you can still find this task by using the workspace search in the sidebar or scrolling to the end of the list, clicking “Completed Tasks,” and searching manually.
In some instances, you may need to reopen a completed task. To do so, just click the check mark to restore the empty checkbox. Your task will be added back to the active list it was originally in.
If the task you’re looking for was filed in a list that has been archived, you can still use the workspace search bar to look for it or click "Archive" in your sidebar to search for it manually. Archived tasks cannot be reopened and must have their list reopened first.