I went back to your first post and realised it is the image
that is 1024 by 667. I was thinking that was the window size.
1] Your developers can fix the window size so you could go
that route.
2] It might be possible but it would probably require some
post generation work by your developers. I doubt they would want to
go with that idea.
3] How about putting the image in a borderless table cell and
centering it so that the margin is uniform? That will not work if
the resolution is smaller but maybe work to the smallest size and
accept a border on all other sizes.
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