-<DD>Detach or reattach <TT>reg</TT>, depending on whether <TT>how</TT>
- is `<TT>set</TT>', `<TT>unset</TT>' or `<TT>toggle</TT>'. (Detaching
- means making <TT>reg</TT> managed by its nearest ancestor WGroup,
- framed if <TT>reg</TT> is not itself WFrame. Reattaching means
- making it managed where it used to be managed, if a return-placeholder
- exists.)
- If <TT>reg</TT> is the `bottom' of some group, the whole group is
- detached. If <TT>reg</TT> is a WWindow, it is put into a
- frame.
+<DD>Detach or reattach <TT>reg</TT> or any group it is the leader of
+ (see <A HREF="#fn:WRegion.groupleader_of"><TT>WRegion.groupleader_of</TT></A>), depending on whether <TT>how</TT>
+ is `<TT>set</TT>', `<TT>unset</TT>' or `<TT>toggle</TT>'. If this
+ region is not a window, it is put into a frame.
+
+<P>
+Detaching a region means having it managed by its nearest ancestor
+ WGroup. Reattaching means having it managed where it used
+ to be managed, if a ``return placeholder'' exists.
+
+<P>
+Additionally, setting <TT>how</TT> to `<TT>forget</TT>', can be used to
+ clear this return placeholder of the group leader of <TT>reg</TT>.