I don't know what browser you're using, but I found extension-based solutions for both Chrome[0] and Firefox[1]. [0] https://chrome.google.com/webstore/detail/

I don't know what browser you're using, but I found extension-based solutions for both Chrome[0] and Firefox[1]. [0] https://chrome.google.com/webstore/detail/custom-pagedown-pageup/gdbibdghoenolnciegjjkdpabgdbpamj?hl=en https://chrome.google.com/webstore/detail/custom-pagedown-pa... [1] https://superuser.com/questions/307739/scroll-down-half-the-screen-size-in-firefox https://superuser.com/questions/307739/scroll-down-half-the-...