Canopy has one button which is located on the to grate and labeled "On/Off". Push the button once and Canopy will go into Auto mode (which provides increased hydration at night and less during the day while you're not at home). To control the setting manually, push the button again and Canopy will set to Low. One more press and Canopy will switch to the Medium setting, and a fourth press will set Canopy to High. Push the button once more to turn Canopy off. The "Water" light wilI illuminate when Canopy needs more water in the tank, and "Filter" light will illiuminate when it's time to replace the filter.