Unlike my friend Michel I don't encourage customization of Normal.dotm for
something of this nature
If it isn't worth creating a specific custom
template comprising those customizations there usually are other options
available. In this case I'd suggest using AutoText.
Go into the Footer of a document that has the content as you want it (or set
it up in a new document). Select the Footer content then go to Insert>
AutoText> New. You can give it a name of your choice if you wish. Make the
name at least 4 characters with no spaces [such as your first & last initial
followed by 'pn': i.e., expn].
When you want to add it to a document just double-click the bottom of a page
to get into the Footer, type expn then press return. Alternatively you can
insert it from the Inset> AutoText > Header & Footer menu as well as assign
a keyboard shortcut to it.
One of several advantages is that you can also use it in pre-existing
documents, not just new ones. Someone may also be able to tell you how to
create an Apple Script to further automate entering it.
HTH |:>)
Bob Jones
[MVP] Office:Mac