I could probably achieve the desired outcome with a Chorded Action (by defining a helper action for "Shift is Down" and then adding it as Chord Action to the left click. However, not only would I need to do this with the modifier I want, I would even need to add Chord Actions for those I don't want: otherwise if shift is down, both "Left click+shift" and "Only left click" will fire. That sounds insane. What am I missing (and why don't I find this in the docs -- this seems like a common use case)?