org-archive-subtree
org-archive-subtree is an interactive autoloaded Lisp function in `org-archive.el
'.
(org-archive-subtree &optional FIND-DONE)
Move the current subtree to the archive.
The archive can be a certain top-level heading in the current file, or in
a different file. The tree will be moved to that location, the subtree
heading be marked DONE, and the current time will be added.
When called with prefix argument FIND-DONE, find whole trees without any
open TODO items and archive them (after getting confirmation from the user).
If the cursor is not at a headline when this command is called, try all level
1 trees. If the cursor is on a headline, only try the direct children of
this heading.