Make reusable element's height equal to page height

I’m trying to build a menu side bar. Since it’s going to be on just about every page, I figured it would make sense to build it as a reusable element. The reusable element is a floating group.

How can I ensure the sidebar is always the full height of the page it’s on?

EDIT: I always seem to overlook the simple solutions. I suppose I could just go to each page and manually extend the reusable element’s height to the bottom of the page. Is this the optimal solution?

I believe that to be the case. Since each page is unique, you need to tell Bubble what your intentions are for the element.