I noticed now use ⇧ + ⌘ + D could list the @done items in to a new project called Archive. I hope the items in Archive could be listed by finished date.
So you mean reverse the current ordering? I can’t remember the details on deciding to put the archived tasks at the top of the list, but it’s how TaskPaper 2 does it, and I remember there was lots of discussion on that decision. I guess it’s possible to add a preference, but I think instead I’d like to wait until scripting is documented. Then it will be easy to write a script that will make it archive tasks to the end of the list instead of the start.