Baseline (Widescreen) Solution & Issues
Native.
Click the 'Settings...' button on the launcher app and select your desired resolution from the drop-down list.
Config settings are stored in the registry: HKCU\Software\Stentec\Sim5\D3D
Scren change is basically Vert-, but the camera controls include an independent zoom allowing Hor+ gameplay (within a limited spectrum) on each camera.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
Native. Basically Vert-, partially Hor+ thanks to zoom.
4k UHD Specific Solution & Issues