Looking Back........

So, I've come from the Race series 'sim'...... I've also done my first GSCE 'public race' whence I finished third.
I had a good battle for a few laps with the guy who noobed out of third and the thing I missed most was the Race07 'Look Back', all I got was bulkhead

Now, I know that there is a 'file' that needs a single line of code altering that allows a 'full screen look back' AND I remember reading a post on 'a' forum about it.
So, does some one know what I'm on about and can they point me in the right direction?
Please.
Ta very much like

Go to USER DATA/PLR file. Open with notepad and go to Graphic Options. You will find many settings you can change to suit the way you drive.

That's the file, thanks Kevin