{Mod edit: split into its own thread, for clarity and focus]
I'm not sure this is the right thread - it's related to the GUI. Most of the Fender amps, when displayed in the Amp View, are shown in a way in which you can't see the exact values of the knobs. See screen shot here:
https://www.dropbox.com/s/wwp1t2vgfu1t5 ... s.jpg?dl=0
You can only see the exact value of a knob when you touch it with a mouse.
I understand how this happened - it's related to the camera's perspective and so forth - but there is such a thing is too much skeumorphism. AT4 showed these knobs in a more user-friendly way.