Hello AGM,
nice to see you once on the other side -
We discussed the blue flag several times in the german section in the forum in the past. You can see the blue flag only if display flags in the settings is enabled - I dont think that its a performance problem with older computer because GTL itself is 12 years old.
Anyway, to see the blue flag always show hug must be enabled because the blue flag is in GTL a little blue lamp in the speedometer (!) - not the best idea of simbin. Its very little and you will not notice it every time if its blinking a little or so.
In qualify its blinking in the first lap if someone cames behind who is hotlapping - so if you are making settings in your car to prepare your driving may be a hotlapper is ver angry because you didn't notice him behind you and the blue flag
In race the overlapped driver has to let pass the overlapper if he sees the blue flag - how much time or laps is not sure. Perhaps its 1 minute or 1/3 of the lap or from lap to lap different. After this unknown time you will get a Stop&Go warning. If you ignore it after 3 laps (?) you get a DQ
We discussed also the behavior for both driver someone say to the overlapped driver: drive your line, dont' leave it to the side for no irritations.
That doesn't work all the time so Linus/Wiege had a good suggestion to me - drive your line in the curves and go a little beside on a (long) straight line so that the overlapper can pass. Perhaps you have to slow down a little (!) to let him pass. May be its a good compromise.
On the other side - the overlapper has to be a little patient and wait for this or an other moment he can overtake. Not trying it immediatly always in the first curve or similar like a bulldog
But if there are more then 2 driver involved the things will be more difficult because everyone has to decide in less then a second and is filled to the bursting point with adrenaline.
Thats what i've found here and in TS - and just my 2 cents.
rdjango