Here's a small enhancement I wrote to add customizable variables for the
`org-export-dispatch' UI options that don't already have one.  I almost always
export with "Body only" switched on, and I got tired of manually toggling it
each time; while I was at it I also added variables for "Visible only" and
"Force publishing", because why not.  Hopefully others will find this helpful as
well.

I tried this out locally by eval-ing the new code and customizing the new
variables, and it appears to have the desired effect.  `make test' and `make
compile' also succeed.

I sent in the copyright assignment form but haven't gotten the contract back to
sign yet.

Changelog:

* lisp/ox.el: Add customizable variables `org-export-body-only',
`org-export-visible-only', and `org-export-force-publishing', and use
them in `org-export-dispatch'.

* doc/org-manual.org: Document the new export variables.

Currently when calling `org-export-dispatch', two of the export
options can have their defaults specified with customizable variables:
"Export scope" (via `org-export-initial-scope') and "Async export"
(via `org-export-in-background').  This change adds customizable
variables for the "Body only", "Visible only", and "Force publishing"
options as well.

-- 
JJW