Hello Kimberly,
You can add a footer to each slide in your presentation all at once from the
View > Header and Footer command on the menu bar. Click on the Slide tab,
and check the item you want to include (there are three choices: date and
time, slide number, and footer). If you want to include the presentation
title on each slide, check the "Footer" box, and type the text you want to
include.
Unfortunately, you can't automatically include the filename per se here - it
looks like you have to manually type in the title once yourself for this to
work. So if you rename the file name of the presentation, you'll have to go
in and correct the footer text by hand, as it looks.
Hope this helps.
Jeff Chapman