iBooks iMac (10.11.6) to iBooks iPadPro (9.3.5) Problems

Good morning,

I wrote a book with iBooks Author (~500 Megs) in horizontal scrolling mode.

I easily imported it on iBooks on my iMac. All the formatting is fine.

When I want to see the book on the iPad Pro, it seems that the landscape orientation is not recognized by the device.

I made all the following tests with the same final result. The file is not usable on the device because it is in vertical scrolling mode instead of the horizontal one.

First, I used the option «Preview with iPad» within iBooks Author. The book appears in Vertical scrolling mode on the iPad.

Second, I tried to add the iBooks to iTunes in order to get it on my iPad Pro.

It doesn't work with either, the «menu command» or the «drag and drop».

Third, I also tested with iCloud Drive and Dropbox.

The exportation process went fine, but in both cases, the book within iBooks on the iPad Pro is in vertical scrolling mode.

I also noticed that those procedures were not working with an iPad 2 but were fine with an iPad 3.

So, I decided to configure the iPad Pro with the same settings found on the iPad 3 to no avail.

Look at the screen capture attached.

Thanking everyone for help in advance.

Pierre-Y. Plourde