[authors] Using more than 1 master slide in a presentation

[Jean Hollis Weber]

Can someone give me a good example of when you might want to use 
slides based on more than one master slide in a presentation? (By 
"good" example I mean one where using >1 master slide would 
enhance the presentation.)

Thanks!
--Jean
P.S. Happy Thanksgiving to the USAmericans among us!