Marking tasks as done

You can mark undone tasks as done and vice versa.
How to mark a task as done:
    Select at least one task in the list view.
    Click the Done icon in the toolbar.To mark the selected tasks as undone, click the Undone icon.
Related topics:
  •  Editing Tasks⁠  Changing a task's due date⁠  Changing task confirmations⁠ 
Parent topic:  Managing Tasks⁠