> Each knob on the Master Control Panel has a different geometrical shape, allowing the user to distinguish the knobs by feel.
Auto manufacturers should take a clue here.
See also: the distinct shape of the flap and landing gear levers (which are often located next to each other).
https://aviation.stackexchange.com/questions/22680/why-is-th...
See also: the distinct shape of the flap and landing gear levers (which are often located next to each other).
https://aviation.stackexchange.com/questions/22680/why-is-th...