Thanks DoctorOoh, you are right. I should have thought of that myself
Still... this is a feature that is a bit annoying, if anything from an aesthetic point of view. Also, as my book is not fiction, there is no surprise element
and I think I would prefer to be able to scroll the footnotes one after the next.
Anyway, as I understand it is not possible, I will have to live with it
Not a huge deal