Each FX Chain has “Functions” that you can use to map multiple parameters to one knob as well as map ranges of control. Here’s a video I prepared some time ago explaining how you can use this feature specifically as it pertains to emulating the behavior of the ribbon strip on an H9, but the concept is the same for you.
You can also read up on Functions on page 81 of the new 2.0 manual, which I’ve attached for you.
