Find a bar where you'd like to 'hear' changes and press F5. Explore those options...lots of them there.

Note that at the top you can make the change happen on every chorus (verse) or only on say 2 or whatever.

If a midi track is there you can also change instruments, for example go from one type of guitar to another...

The suggestion about the videos is valid. And hard to do when there is so much to 'play' with.

John Conley
Musica est vita