Track Settings

[Roxyrama]

In practice mode there is an icon named "Track Settings". Within in this there are options to change such settings as,
Time, Time Progression, Weather At Race Start, Weather Changeability, Surface Water At Race Start and Grip Reduction On Wet Track/Track Edge.
Only the last one is accessable as the others have a red line through them.

Can anyone tell me how to overcome this problem?

 

[daan]

You need to select a track that has time progression and weather.

https://www.gtplanet.net/gran-turismo-5-official-track-list/

You can only change the time and weather at a track that has time and/or weather next to its name.