[dba-Tech] How do I see what a backup set is backing up

I created a backup set for my laptop.  I can get to backup, I can open the
utility, I can see the schedule, but I'll be damned if I can figure out how
to view the tree of what directories / files that backup set is supposed to
be backing up.  

1) Is it me, or is this unintuitive?  
2) How do I see / change what the backup set is backing up?

John W. Colby
www.ColbyConsulting.com