Another approach is to make a multistyle for that song.

For example, let say you want a song that goes from Style1 to Style2.

1. Load in Style1.
2. right click on any part marker (or any bar number). Choose "Define C/D"
From the styles menu that now appears, choose Style2

Now, you can simply select styles a/b when you want Style1 and c/d part markers when you want style2 (right clicking on the part marker will remind you of the styles.

Then you can freely switch between style1 and style2.

If you like this, and want to save it as a STYLE, enter the StyleMaker (press the MISC button, and then enter Style2 on the MultiStyles line, and then Save the style with a memorable name like Style1&2

Have Fun!
Peter Gannon
PG Music Inc.