With the Artboard tool, the Properties panel now starts with a Transform
section: the reference point shared with the Transform panel and the
Control bar, the active artboard's X and Y (of that point), W and H with
the Constrain Width and Height Proportions link, its preset and
orientation, and Move and Scale Artwork with Artboard. The Artboards
section follows with the name, Artboard Options and Fill. A new W or H
now keeps the reference point in place, as in the Transform panel.