The problem is that, if I was supporting horizontal scrolling the way I support vertical scrolling, you would be able to scroll the page partway, but that would only ever make sense while you are playing the very last section of the page, and I'm not sure if it's better to have a slow scroll to the next page or just a complete page turn. If a complete page turn is used, then this seems to me less of a "horizontal scrolling" display mode, and more of a "single page display mode with a small preview of the next page". If that's really all you want, I actually think this could be an option for the single page display mode where it will display as much of the next page on the screen as it can instead of only showing one page at a time. This would require some fixes for annotating though, as I currently have code that assumes only one page is displayed at a time while using the single page display mode, so there would be some required effort there to adjust for this. If you think there is value in having the page slowly scroll horizontally once you reach the end of the page and want the next page to slowly scroll over, then this would require a separate display mode.
Mike
Mike