Hey Brett,
I don't know if I get your question, but if you have the
document in Word then however the number of pages there
are for that specific file (i.e. 3 pages) all those pages
will automatically faxed once you do Print-->Fax-->Send
If you are scanning a document, I suggest you use Word,
then run an OCR (optical character recognition) to turn it
to text file then voila! Print-->Fax-->Send
It doesn't really matter how many documents
so long as it is 1 File only--A file can contain one or
more documents.