How did you get the watermark to appear in the movies?

I downloaded the stuff for chapter 2. When I pressed Ctrl+Enter within UsingMovieClips.fla I see a watermark at the bottom. Couldn't find it in the ActionScript or in any file I noticed in the directory. (Watermark saying: 'From "ActionScript 3.0 Game Programming University" by Gary Rosenzweig -- http://flashgameu.com')