We have made a basic default key guide for Wings Over The Reich. It's kept on our Support page WOTR Key Guide
Note you can rebind your keys and controllers in the Workshop. - "Re Map Keys/Controllers" button will launch the easy to use WOTR Function Binding Tool.
If you want to rebind a key it will check if it's in use, and if so will optionally take you to current binding where you can delete or change it.