org-refile-active-region-within-subtree

org-refile-active-region-within-subtree is a variable defined in `org.el'.
Its value is

nil

Documentation:
Non-nil means also refile active region within a subtree.

By default `org-refile' doesn't allow refiling regions if they
don't contain a set of subtrees, but it might be convenient to
do so sometimes: in that case, the first line of the region is
converted to a headline before refiling.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.