Hi,
I've found two options one of which always works and the other has a baffling variability.
The first is to set your preferred view zoom then save the flight. If you then reload the flight it comes up in the zoom you set. You can set different zooms in the various views and all come back on reload.

The second is to set the zoom in cockpit view looking forward, then select LEFT window view ("4" key) and set the zoom the same, then press the ENTER or RETURN key and return the the forward view. The zoom is then set. I've only tried this in cockpit view and I know that it doesn't always work on every aircraft but don' t know why !!

Degsy