On the measure where you want to mute an instrument(s) press F5 - See pic 1-F5
On the measure where you want to unmute an instrument(s) press F5 - See pic 2F5

Attached Files (Click to download or enlarge) (Only available when you are logged in)
1-F5.jpg (93.62 KB, 56 downloads)
2 F5.jpg (98.54 KB, 56 downloads)

Love is grand.
Divorce is twenty grand!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware