PG should consider the exact dimension on the size on the preview. The horizontal is fine, but vertically you fill up the entire workspace as big as the screen can go, which makes previewing it a bad experience. I want to see the exact dimension, not as far down as it can go, especially when i have background set to cover.
Does this look like how a preview should be? https://cl.ly/0V1e2D2k103E
On a real browser, and on chrome browser device simulation, you won’t even be able to scroll as far down as that, because it’s set within the viewport.