There are several options for foot control of the Axe-FX III. Here is a look at the big daddy, the RJM Mastermind GT22. RJM say that the GT/22 is "The most advanced and versatile MIDI controller pedal ever created" and I have to agree with them. It's a behemoth in both capability and scope. I've only touched the surface here, but I hope you get the idea. More soon and as discover its vast potential.
Thanks to Ron Menelli, Buddy Gill, Fractal Audio, Andrew Farnham, Carole Johnston and Ernie Ball Music Man.