I don't think the aspect ratio is the problem. My map doens't fit either.
To me that isn't much of a problem as I only play with a steady group and develop the campaign as it goes. I have the map published on the net and had my players download it for reference.
Also. if you use a vignette, you can show the players the whole map when needed.
Hey! I'm curious - you Overview map is not working properly (doesn't fit) and you can't show it to the players?
There are controls on edge of frame allowing to crop and transform image. Isn't that not enough? You also scale it with mouse wheel and drag around while holding mouse left button
