I recognized right away that I do this — now a horizontal, now a vertical — a lot on a shoot, but I didn’t know quite why. Sure enough, though, responding to the challenge, I see an example of a landscape perspective:
followed by a close-up vertical “portrait” perspective:
Too bad, though, it leaves no particular perspective for the dozen eggs, bottle of milk, and loaf of bread I also bought at my neighborhood supermarket. Food for body and soul — bread and roses!