@superbetsy Also a good starting point to explain the difference between "normal" and "natural" scrolling. Normal or old style moves the viewport, which feels natural with PgUp/Dn or cursor keys. "Natural" moves the document which feels natural with a touch interface.

The mouse wheel is controversial nowadays. I stubbornly keep disabling "natural" scrolling for my mouse with scroll wheel. Roll down = scroll down!!

@ednl @superbetsy

Hmmm ... so you could say that "natural scrolling" moves the paper scroll, while the other method moves the viewport window of the paper scroll.

Hope I got it right ...