how to set VC to be always at 75%

How do I set that the VC is always 75% for a specific plane. I have now saved a flight with the VC at 75%. The problem is that now all the planes defualt to 75%.
I know that u can set the % for normal view in the pannel.cfg file.
Thanks
I know that u can set the % for normal view in the pannel.cfg file.
Thanks