What is the knob for?

The Industrial series machines are equipped with a TFT touch screen for the interface and control of the machine.
However, on the side there is a small knob that you can turn and press: what is it for?

1. Adjustment: in various commands, the wheel allows you to increase or decrease a value on the screen by turning it.
2. ESC: when you browse the interface you can enter secondary menus and superimposed messages may appear. By pressing the wheel you can exit these menus as with the esc key on your computer. (This does not interrupt printer actions, for example it does not interrupt a print or calibration).