I do this...

I hide the details.
then select the subtotal range
Edit|Goto|special|visible cells only
apply the formatting I want.

If I really need this to be mechanized, I'd record a macro when I did it
manually.

David wrote:

I've got a very large spreadsheet where I've used the SubTotal command, but I
want to bolden each sub total and increase the font size. Rather than go
through each sub total and add the formatting is there a function where I can
apply this the one time so it applies the formatting automatically?

Thanks
--
David

--

Dave Peterson