Though unfortunately I cannot open your file right now since I'm still stuck with Hype 2.5 due to current Mac OS 10.6. I know it sounds a bit strange, but I have a plethora of programmmes (and myself in the midst of large project to finish first) needing upgrade before any OS-stepup is undertaken.
Yet: if I -- understanding you correct -- uncheck the 100% option -- and do as you suggest -- the page (and the button) won't scale, right?
What I would love very much was that one could maintain both the scaled proportions of placed objects and their spaces in between, when, in this case, the window width (in browser) is reduced by the device or user.
On some occasions I've seen these objects react OK responsively but when the document window is reduced to a specific point the placed object won't follow the relative positions but instead is reduced to nothing.
Also thanks to you Steve:
I this very layout displayed I can indeed use your advice, since the "button"-object scale to a point, which cover the underlaying image acceptably. Still I would face problems if I had made several urls, but it will do fine in this case.
Many thanks to both of you for your kind feedback.