Sure! Thank you for responding.
I have one group on the page and luckily it has a border around it so you can see the size.
There is nothing else on this page at all. The nav bar is a floating group.
This first pic is what it looks like at loading:
Then, I can scroll away the group and go down to all blank white space…
It’s like the height of index is too big? I’m not sure what causes this, but I don’t find a dynamic setting for height as there is for width in the responsive layout design