Can I connect a remote volume control and assign it to control what ever input or output level that I choose, and cause that selected input/output to be different whith each preset?
Yes. This is all done in the Control Pin Configuration window.
For example, in preset 1, you can have the volume control effect inputs 1 and 2. In preset number 2, you can have the same volume control effect outputs 3 and 6, instead, etc.