"""""""""""""I'm not sure about doing a preview, it would be nice to have but I've got to balance that against how much time it would take to implement it"""""""""""""""

I understand, it might be overkill for this feature.

An options button might be interesting instead of adding another dialog.
It would make it a simpler and less intrusive, you change it only if you have to.
Saves could 'stick' between sessions.


Marc