Navigating textbooks aka protected PDFs in SmartZoom®
If a textbook is in a course/folder with slides, opening it you will see a slip screen, you have the PDF on the left(1) and the first slide on the right(2). If you would like to just see the PDF, or just the slide you can expand each respectively(3).
The PDF has the standard navigation(4) where you can switch between pages and adjust the zoom level. On the slide side, you have our basic slide navigation, with zooming in and out(5), a list of annotations(6), and at the bottom, you can switch between slides(7) if there is more than one. Please note, end users can't create annotations on textbooks, but if you created annotations on the slides in the same course/folder as the textbook, you will still be able to see them: