Each knob has the rotory control - plus a single press function, a double press function and a press and hold function.
I havent decided how Im going to run mine, exactly yet - but I have an idea. Double press of the first knob will always make that first knob the page selector - and Level will always be on the same knob (as any changes may need a level adjustment). The store is always a long press of that level control so on the fly changes can be stored instantly. The rest are, in my mind at (rotary control followed by single press function):
Page 1:
Gain(boost) - Bass (Cut) - Middle (FAT) - Treble (Bright Switch) - Prescence, Depth, MV, Level. Top row, Input Trim - Overdrive (for those amps that have it). Bottom Row, Sag - Bright value
Page 2:
Crunch - Tube Type - Character Freq - Character Amt - Dynamic Pres - Dynamic Depth - Dynamics - Level. Top Row, Low Cut Freq - High Cut Freq. Bottom Row, Sat Type - Sat Drive
Page 3:
First 8 knobs, the 8 Amp Block EQ sliders.
Thats as far as Ive got - and all are possible to assign as I plan from the RAC12.
From that - page 1 will give me most of my tone shaping parameters, with page 2 giving me the rest (the ones I use the least) - with page 3 giving me the EQ page. I may add some others to page 3, ones I very rarely touch such as Power Tube Bias, or the Variac (AC Voltage), just because they are available. I may well user other pages for FX specific stuff, like levels for delay, reverb, phaser etc for on the fly adjustments - but having the main amp stuff there without any presses - and in depth stuff there with a double button press and a rotary twist (to select page) just makes live adjustments so much easier IMO.