When I read the PDF files in iBooks there is no curling effect over there like it is for reading ebooks.
Is it possible to enable the curling effect for reading the PDF documents in the iBooks?
You might find a third party PDF reader that will do it. I seem to remember seeing a quick review of one, but can't remember the name. It was a newer one, and only a reader (no annotation or other PDF tricks).
When I read the PDF files in iBooks there is no curling effect over there like it is for reading ebooks.
Is it possible to enable the curling effect for reading the PDF documents in the iBooks?
PerfectReader Pro does page turn animation. Not as nice as iBooks (from the look of it) but there nonetheless.
Understand I am not recommending the app. I have no personal experience with it. The reviews are merely OK. But where one app exists, there will be others.
But if an improved reading experience with PDF files is important to you, then there are alternatives. You're just going to have to do some research.
There is curling transition for pdf's in Kobo app too but the best afaik is there in SideBooks, very close to iBooks, not just R-L or L-R but also T-B animation (Right, Left, Top, Bottom).