From playing around with the Embed API, it seems that you cannot scroll through the pages in the sized container mode. Instead, the dock at the bottom is a bit different and you have to click to go through the pages. Is there an option to make the sized container PDF scrollable as well? So when the user's mouse is over the container and they scroll, it will move through the pages (like the Full Window mode).
You can use Full Window but set the size of the container to be a defined width and height to get the scroller. Full Window is slightly misnamed, it just expands to the full dimensions of its container.
Right. This is the approach that I decided to take. However, the Full Window mode lacks the ability to make the PDF become full screen when it's used this way.
There are definitely trade-offs but you can easily add a link near the "Full Window" element that triggers another Embedded View that uses the Lightbox mode with the same PDF.