The mysteries of pizza boxes

Last night we had pizza delivered, as, I suspect, many people do while preparing themselves for Thanksgiving.

All pizza boxes have a whole range of carefully printed choices on the outside, with boxes (or open circles) to check: extra cheese, sausage, meatball, mushroom, pepperoni, peppers, onions, anchovies, etc.

My question: as anyone ever seen any of these things checked? Or is merely decorative, or vestige of some now obsolete practice? Someday soon, I suppose, your phone will tell you what's in each box, useful if you're handling a large crowd. But I suspect these notations will remain, because otherwise it's just a flat cardboard box.

Hope you enjoyed your pizza, and have a good Thanksgiving.