[Evolution] switching to HTML

[carpetnailz <carpetnailz researchintegration org>]

I have my evolution mail set to show plain text only, but occasionally I
get a piece of html mail that I need to see as html. Is there some way
to change "on the fly" for just that piece of mail rather than having to
go to the edit-preferences-mail preference location and change the
setting globallly, and the having to go to change it back again when
I've finished with that piece of mail?

Related question: what does the "Prefer Plain" setting do?

thanks.
nailz