Hi,
evince already supports smooth scrolling, but only when using the mouse/touchpad. Personally, I use the vim keys j-k to scroll most of the time, but evince won't scroll smoothly in that case. I think both firefox and chromium have smooth scrolling when using the keyboard, so I'd expect evince to behave the same way, but it doesn't. Is somebody working on implementing it, was I just too dumb to find the option or is this feature not considered useful?