PDF based flip books compatible with Apple Books app?
Having done some searching, I realize that flipbooks are usually HTML5 or Flash based, and that many find them irritating. However, what I am finding irritiating is that in the Apple Books app, some of what they offer are in PDF format, mostly books with large graphics, and of those books, some have a page flipping effect and some do not.
When there are graphics that span two open pages, this is helpful because you can view two pages in landscape mode without any gap between the pages.
There are other PDFs that simply scroll, and any PDFs I upload to Books myself can only scroll and only show one page at a time.
I have already contacted Apple's customer support, and they can't offer any explanation why some PDF books flip while others scroll. The EPUB format has a menu option to switch between scrolling and flipping, but none of their PDFs have this same option. HTML5 and Flash are not compatible with the Books app, so they have to be in PDF format.
So, how are some PDFs, at least those offered in Apple Books, able to flip pages and show 2-up in landscape when others don't, and how could I apply this to my own files when I upload them?
