Pinning a Window to the UI


I’ve scoured the web and searched the forums but can’t seem to find any information - hope you can help.

I’ve currently got a non-modal Window containing a few components. Is there anyway to ‘pin’ it to the UI even when scrolling? Currently when I scroll, the window remains in the same position on the page, blocking the content below. Is there any way to fix it in place, so it moves with the rest of the page when scrolling? See pictures for a better explanation.