An electronic device may include a touch sensitive area located within a cover; a first side of the cover within the touch sensitive area includes a capacitance reference surface; a capacitance sensor disposed near the second side of the cover at the touch sensitive area; a selectively illuminable light source disposed near the second side of the cover; a processor; memory in communication with the processor; programmed instructions that, when executed, cause the processor to receive a non-contact input from the capacitance sensor; and send an instruction to illuminate the selectively illuminable light source in response to the non-contact input where the selectively illuminable light source illuminates a feature in the capacitance reference surface where the non-contact input represents a proximity measurement that may be over one millimeter away from the cover.