Scrollable list

[BCPKerridge1]

I'm lookin to achieve something similar to this from the CAMRA tool https://livingatlas.arcgis.com/assessment-tool/explore/details  where I have a list with a too many items to fit in one page vertically, when combined with the other elements of charts and maps.
I have tried a number of configurations with Scrollable pages and Screen groups, but none seems to have the ability to keep the main menu on the left hand  and chart on the right static, whilst the list is  scrollable.
Any advice greatly appreciated
Bruce

[JenniferAcunto]

Place the list inside of a Column element.