1. View > Header and Footer, then switch to the footer
2. Insert > Field
3. Scroll down the Field Names list and select FileName
4. Select the desired format (I like title case)
5. Check the "Add path to filename" box
That will put the full path and file name at the bottom of each page of the
document. I would also recommend adding the date and time that the file was
last saved. To do that:
1. View > Header and Footer, then switch to the footer
2. Type: Last Updated:
a. Put one or two spaces after the colon
3. Insert > Field
4. Scroll down the Field Names list and select DocProperty
5. Select LastSavedTime from the Property list
Now, not only do you have the full path and file name, but you also know the
last time the document was saved, and therefore how recent/outdated the
information may be.
I put these two fields at the bottom of every document that I create. In
fact, I created a template that contains these two fields and all of my
documents are based on that template. BTW, you can do this in Excel too.
--Tom