Because you can access the session settings in the game mode. As long as you don’t exit the mode it applies.
Keyboard is ESC then ‘Track and Time Selection (can’t recall exactly)’ but you can change setting to Equal and it should hold until you exit TT.
Just exactly how I change for Realistic / Official time of day. e.g. night race at Singapore TT is always set to Midday, so I change it.
That still exits the session and starts a new one. There's no way to apply any settings from the "car and track selection" menu without it restarting the session and thus reverting the performance setting.
