Think outside the box on this one :)
I've done crosswords and such before. If the answers are on a different
page, why kill yourself to turn them upside down?
A newspaper in my area was actually turning sudoku answers upside down
from the day before, I emailed them how stupid that effort was and they
stopped doing it :) hahaha
But if you must... I guess if the answer is created in a separate
Then maybe select the entire answer, copy and paste as an image, then
turn it upside down??
Or maybe do a Print Screen, open that in a simple graphic program,
paste, crop, rotate, and re-insert into your pub....