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Pg up/down? Scrollable media is still "new". There's no reason we couldn't or wouldn't redesign for it.

• db48x 4y ago
  Yes, the traditional way to implement paging was to simply redraw the screen once at the new position. As long as it always moves a consistent amount, you’ll get used to the discontinuity and you won’t lose your place. Emacs still works that way by default, but even it gets more smooth scrolling options with every release. Even so, on an EInk display you will still have the old text fading away for eight frames while the new text fades in for eight frames. It will not be instantaneous at all, and the text will be low–contrast and overlapped for that whole time. And this happens as you edit the text too. Adding or removing lines will shift later text up and down, turning it into a blurry mess. With word wrapping it will be even worse, as every character you add shifts the later text to the left as well as further down. Still, they work ok for static text that you move by a whole page at a time.