Back in the 90s there was a controversy, now happily long settled (and so perhaps unfamiliar to many of my younger readers), about “letterbox” versus “pan-and-scan” video formats. See, most movies by then were widescreen (and this had been so for decades), but television screens were still 4×3, which had been the dominant aspect ratio for theatrical movies when commercial television first became widespread – which meant that movies with a wider aspect ratio (which soon became the majority), when shown on television, either had to leave out whatever was happening at one or both sides if the screen, or else shift back and forth between them (the latter option being the origin of “pan and scan”), even if the original scene had been intended to be static. You can see how this mismatch between theatrical and televisual aspect ratios would ruin, for example, scenes like these three from Lawrence of Arabia, North by Northwest, and The Good, the Bad, and the Ugly, all of which could show one of the main characters in a scene only by completely eliminating another.


