How to put a fermata below a full-measure rest

[Ted Hopp]

I'm fairly new to LilyPond and I'm wondering if there is a recommended way to
put a fermata below a full-measure rest. I tried:

  R_\fermataMarkup

which put it in the right place but did not invert it (it still opening
downward). I also tried:

  << { R } \\ { s_\fermata } >>

which sort of worked except the fermata was off to the left and the rest was too
high on the staff. I assume both of those can be corrected by overriding the
right properties (once I figure out what they are), and this is what I'll do if
there's no better way. But this seems like its getting way too complicated.

Thanks!