**** Jump - seems really hard to use.

C-c C-j.  Opens help window with cursor in it, so I have to C-x o to
get to Org-goto window.  Then, once in the goto window, hitting tab
opens the subtree, but pressing a down arrow again goes back to the
top.  Seems very useless for actually finding anything.  Am I using it
wrong?  Dropping a mark and C-x C-x seems much easier.