Hi Xebar,
I sometimes use this crude method:
Xebar Saram <zeltakc@gmail.com> writes:
> i was
> wondering if there was any command to auto pack empty space between
> headers?
M-< C-M-% ^C-qC-jC-qC-j+ RET C-qC-j RET
Otherwise you can tweak `org-blank-before-new-entry'.
HTH,
--
Bastien