Make EPUBs scroll by line instead of by page

[makeinstallcelan]

Would it be possible to make epub files scroll by the line instead of by the page. When I looked for a replacement for CoolReader the only reason I haven’t switched is because you can only scroll by page when its an epub.

[GitHubRulesOK]

This was always possible by switching UserInterface
This is much easier in version 3.2 by using the debug option Toggle ebook UI