The Knob is an endless encoder with a resolution of 100 pulses per revolution and a very long-life of more than 1 million revolutions. The two main purposes of the Knob are scrolling through the UI and setting parameters. The Knob's focus is always indicated by the dancing cursor which depending on the situation might be selecting something in the Main Display or the Sub Display.
The Knob's sensitivity can be toggled via the nearby fine/coarse button. The exact meaning of fine vs coarse will depend on the type of parameter that is being manipulated.
'''Super Fine''' and '''Super Coarse''': Holding SHIFT while turning the knob will accentuate the fine or coarse setting. In other words, if you are fine mode then holding SHIFT will make the adjustments even more fine (generally 10 times more fine). If you are in coarse mode then holding SHIFT will make the adjustments even more coarse (generally 10 times more coarse).