control over thickness of spine and opening angle in paperback-option

Jaap van der Zwan 8 years ago updated by Vitaly Ovchinnikov 1 year ago 1
Boxshot 4 is a marvellous update.
However, I have een question: is it possible to adjust the thickness (spine) in the "Book: Paperback"-option and I would like to change the angle of opening, is that possible too?