In any of the old versions, there was an option of "full page" view in which buttons "page up" / "page down" would go to the entire previous / next page, and not scroll to a part of it. This options is now split to two ("enable scrolling" + "fit heith") , while all buttons (pup/pdn/arrows) work the same way. It's much better, in terms of productivity, to have the arrows to scroll within a page, and the pup/pdn buttons to move to the previous/next page.