Hi J.M.S.
Thanks for explaining about Zoom to page level. It's not something I ever use –I do View > Zoom > Fit height if I want to see a page fitting the window. However, I've just had a go at using Zoom to page level.
In order not to show any pre-published confidential material, I created a new blank PDF page and, as you say, selecting Zoom to page level, there's NO scrollbar.
However, it dawned on me that if there's only one page in the doc and we're viewing at page level, there's nowhere to scroll to ... and maybe that's what the developers thought ...
... so I tried adding a second blank page and immediately the scroll bar appeared (see attached – this time with more helpful file names).
I then had another thought and deleted my extra page again so I just had a 1-page doc. Viewed at Fit Height or Zoom to page level, it tells me it's showing at 59.8% and there's NO scrollbar (see attached).
However, if I increase the percentage size to 75% so now not all the page is visible, the scrollbar appears.
I don't know if this helps and sorry that I'll need to press on with work, so I can't reply for now, but fingers firmly crossed.
Thanks for the work you did with this.
The thing is, when I view a document like your 2-page doc, I don't have the scroll bar. But I guess this is because you have continuous scrolling enabled, and not single page view.