If there is any updates after v39.3a, add keyboard shortcut changing!

This is highly annoying, and I think it's about time we can be able to customize keyboard shortcuts. I've heard you can modify shortcuts for loco operations, but not for for instance turning on consist numbers (F7 Key). For some reason I can't get them to turn on when I press F7, so it would be nice to change it to anywhere between 1-9 or a-z. This is the best train sim around, why is it so difficult to make this a feature?
I just don't understand.
