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

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1-F5.jpg (93.62 KB, 56 downloads)
2 F5.jpg (98.54 KB, 56 downloads)

Back in my day the only time we started panic buying was when the bartender shouted "last call"!

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