Paul, as you probably know this is the display settings. If automatic doesn't do it for you, as this should adjust display accordingly, then you can change the brightness and contrast from current to liking and it should stay adjusted. Try it, nothing to lose!
Adjusts the display brightness, contrast, and more.
Function Available setting changes
Turns off the display while still providing audio content. ―
Selects the center display brightness mode.
Adjusts the brightness of the center display.
Adjusts the contrast of the center display.
Show Drive Results at Ignition Off
Provides energy efficiency results at the end of the drive.
Home Screen Clock
Selects the clock style displayed on the Home screen.
Enables a simplified interface accessible from the Home screen.
Restore Factory Settings
Restores the display to the original factory settings. ―