But you have scroll bars and your zoom is off on the bottom map.. They way I have mine I can see the whole of both maps with no scrolling..
I clipped the last two columns on my ignition map.

It took me about 30 seconds to replicate your example. I'm sure I could tweek it to get rid of the scroll bar. Your viewing screen is obviously quite a bit wider than mine. You should have no problem making a tuning tab like you're wanting.