Bob,
Thanks for having a look. I am not sure that will work, but may be on the right path.
I have two different dimension files one is wider and the other is taller, so if I have a constant value, e.g. 1100(w) x 647(h) then the taller file is distorted. So I was mulling the idea over of having the file be evaluated and = 100% of itself rather than having a fixed number.
The other file's native file dimension is 479(w) x 647(h).

Thanks again for sifting through my cryptic explanations....