Your video helped a ton. I was able to replicate exactly what you did.
However for some reason, these settings dont work for reusable elements.
Let me explain.
In this case, the floating group that I referenced in the title is a reusable element that will be either a header or a footer. The 900px tall group in this element would be the “page”.
For some reason groups within reusable elements cannot scroll. And despite the fact that I was able to successfully replicate the steps in your video on a test page, they’re not working for me for my reusable elements.
Are the rules different?