If this is an urgent need, please contact our custom development department by visiting
http://www.leadtools.com/devservices/ for a quote.
As for now, you will have to do the math and calculate the size mode to Normal, and calculate a ScaleFactor that will display the image accordingly.
In your example, the scale factor would need to be about 10 (viewer height / image height). I say about because you may need to do some minor changes to the calculation if you are using AutoScroll because sometimes the vertical scroll bar will still have a little bit left to scroll.