When I check off a sub-task (indented under another task) to mark it completed, why does it always remain in the screen (grayed out)? To remove it I have to delete it.
(Presumably this affects karma too, but I'm not worried about that).
Sub-tasks stay on the list until their parent task is completed (for reference).
If you prefer to remove them, there are two options:
1. Right-click on a completed sub-task and choose "Move to history"
2. Hold the SHIFT key while you're checking a sub-task off and it will be removed from the list right away.