John McWilliams wrote:
[...]
If she'd get her horizons straight, she'd get the + after the A.

It's a myth. First, it's "level" not "straight". And even the
admonition to level the horizon is mostly a myth.

A waterline meeting the horison -- O.K., we expect that should
be level. Terrain isn't usually level. The image of water meeting
a bank won't generally be level in a photograph.

Level the *camera*, on the roll axis. That may or may not level
the horizon.


--
--Bryan