For the mains just touch the horizontal meter on the right hand side of the screen while in the setup mode, then touch tweak.  Likewise touch the monitor you want to work on while in setup then tweak.

Hi Bruce

It's a great way to learn what it is that your ears actually hear.

You can go into the deep tweak mode and read it out.    there is not a document that lists the changes as different parameters are affected depending which preset you select.