Yesterday, I updated my Paperwhite's firmware to version 5.7.2.1.
Sometimes I like to read in landscape mode, and spent nearly an hour last night hunting for the page orientation settings. They have, HA-HA, moved, but I finally found them:
With an open text page, tap the top of the screen so that the toolbar pops into view.
Tap the little
Aa icon to open the
Display Settings box.
Click the
Page heading, and you'll see the
Orientation settings at the bottom of the window.