On Thursday, 25 May 2017 at 09:54, Sharon Kimble wrote:
> Is it possible to have a buffer showing the headers of a file in a
> buffer in a popup window to the left of the main window in org-mode
> please?

Try speedbar.

-- 
: Eric S Fraga (0xFFFCF67D), Emacs 26.0.50, Org release_9.0.7-468-g2b44a1.dirty