Hi. It's not perfect but you can do a thing like this:
Global number wHeight=0
Golbal number wWidth=0
System|On start of layout
set wHeight to WindowHeight
set wWidth to WindowWidth
(or System|Every tick
window.resizeTo(" & wWidth & "," & wHeight & ");
And if you set the project's properties with Scale inner or Letterbox scale, you can't see objects outside the scope. I think it's a good solution.
I don't know if there is a better option to do that, but it will be a good feature if not.