Image doesn't scale at Bottom When Scaling Window in Figma

That’s hard to know without seeing your layers. Can you show us how that frame is set up?

Absolutely, let me add some screenshots to the appendix so that you have a better understanding of my current set-up.

See appendix

I understand now. Your image layer is scaling together with the frame when you’re adjusting the window size, because you have the constraint set to Left + Right, and because the image is set to fill, it’s going to resize outside it’s layer’s bounds.

The reason you get the border at the bottom is simply because the image layer isn’t tall enough to incorporate the scaled up image. If you resize the frame in the editor, you’ll see what’s going on. It’s just the image scaling inside of the image layer.

Here are the different modes: https://www.figma.com/best-practices/working-with-images-in-figma/#fill

If you can’t get your desired result, then let me know what that is, and I may be able to give you some pointers.