The current disclosure is directed to labels and tags that employ two-dimensional arrays of self-parallelizing interferometric modulators to display digits, characters, and other symbols. The control section is thicker than the panel section, or protrudes from the panel section. The permeable elements are mounted respectively in the through holes. Namely, a user registration screen displays a telephone number, name, itinerary, accommodation facility, interested things, shopping list, physical condition, etc.