Put on an old winter coat for playing in the snow, found a forgotten chemical hand warmer in the pocket. Boil to charge, snap to discharge.
To ??answer?? my own question: it appears to be a measure of “chunkiness”, as in “won’t look right if printed bigger than 72 DPI”.
photo people: I don’t understand when computer apps say my picture is 72dpi. Unless it is printed, how can you measure dpi?