this is pretty much the same wish, back from February 2023:
I honestly don’t understand why it has 0 votes. Maybe I’ve poorly described it, maybe no one needs it (I can’t imagine why). The way I proposed to implement it is by holding «patterns» button to activate another set of selected tracks. It doesn’t need «shift» to be hold and doesn’t imply using another color set, because when you hold it you see the second set of selected tracks and don’t see the main one.
But I don’t care about the way it will be implemented. I just thought it’s a pretty crucial feature for lives.