This package provides the functionality to automatically export with org-pandoc-export-* modes. It adds a hook to exute it when you save the file. It will look for the following tag:
#+auto-export-pandoc: to-markdown
You can add the tag muliple times to export to multiple formats:
#+auto-export-pandoc: to-markdown
#+auto-export-pandoc: to-latex-pdf
#+auto-export-pandoc: to-html5