A rotary knob is any round control that you turn (rotate) with your fingers to adjust a setting — like volume, brightness or frequency. Any rotary knob usually rotates both clockwise and anticlockwise, and sometimes it may be pulled or pushed to execute a specific function. Ergonomics refers to the science of designing systems that will enhance safety and ease of use for humans. It deals with the design of the seats, the cockpit, the instruments and their position. For ease of use:

• when rotating a rotary knob clockwise, it increases the respective value.
• when rotating a rotary knob anticlockwise, it decreases the respective value.

This is a universal setting to reduce errors and enhance mucle memory.