Watch the flame, not the knob, as you reduce heat. Match the flame size on a gas burner to the cookware being used for fastest heating.
Never let the flames extend up the sides of the cookware.

The flames on the surface burners may burn yellow in the presence of high humidity, such as a rainy day or a nearby humidifier.
After LP gas conversion, flames can be bigger than normal when you put a pot on the surface burner.