I tried setting the display mode to a particular scale with the appropriate pane selected, but the results were not at all accurate. I can't find a good explanation of this in the addendum.
Any explanation is appreciated.
The section on panes in the Addendum is next to worthless because it doesn't explain how to use them, only what they are supposed to do. It's not even shown in the illustrations in the addendum and I have not been able to figure out what it tells me or what it does. It took me a while to figure that one out. However, like you, I am having trouble obtaining the correct scale on the panes. Plus, It is very easy to loose your selected scale if you make the mistake of zooming-in while the pane is active.