An interface system for a tub system comprises a screen plate adapted to be mounted to a tub wall. The screen plate has keys representing functions of the tub system, and being made of a material allowing light to pass therethrough. Lights are positioned in register with the keys of the screen plate and concealed from a visible surface of the tub. A controller is adapted to receive commands from a user of the tub to actuate any selected function of the tub system. A light actuator actuates the lights to light up the keys associated with the selected function to visually indicate actuation of the selected function of the tub system through the keys.