I have version 2008.5

I tried the F5 Bar Settings dialog that MartinB suggested, and it works, but only for specific bars. What I would like to do is control the mute settings for melody for entire choruses. For example, I'm currently working with a 32 bar piece, with three choruses of the same 32 bars. I woudl like to mute the melody for all 32 bars in chorus 1, play the melody for all 32 bars in chorus 2, and mute the melody again for all 32 bars in chorus 3.

There's a Melody/ Mute Melody during Middle Choruses setting, but what I would like is to Mute Melody during any specified chorus. Is there such a setting?