You may be better off posting this to the
Dreamweaver
Forums. That said, I don't have Dreamweaver but someone on here
may have and could help. The problem you have though is that it is
sometimes hard to identify a font as it depneds on what fonts are
installed on a user's PC. The use of fontsets allow help authors to
specify a default font but substitute it for another one if the
user doesn't have the default font installed. What this all means
is that the font you see may not be the one they developed the help
in.