I would like to add a little something to all the help everyone has
offered on the formatting issue in Excel. If you would like to format
all sheets including (Header, Footer, etc..) you need to make sure and
use the "page setup" under "file" menu, because using the formatting
from the print preview option will only make changes to the sheet you
are currently viewing.

I'm guessing but I think MS wanted to make sure you don't accidentally
format all sheets thru print preview so they make you choose it from
the file menu. It is the same thing as the repeat columns and rows,
which are greyed out under the print preview option, but not when you
choose "page setup" under "File"

Make sense?

Hope this helps.