With lfs lapper, after some drifting laps... i type !drf and nothing happen...how i set it ?

Wrong section, but..

..likely $defaulttopcar issue.

In the LFSLapper.lpr file, search for $DefaultTopCar

You'll probably see a line that has $DefaultTopCar = "XFG";

This means that !top and !drf will only show details of times and driftscores for the XFG.

You need to change this line to $DefaultTopCar = "UFR+XFR+RB4+RAC+FZR+XRR+FXR+FBM+LX4+LX6+XFG+XRG+XRT+FZ5+FXO+FO8+FOX+MRT+UF1+BF1";
or how many cars from that list as you need.

You must use capitals.

Thank you mate and sorry for wrong section

#$DefaultTopCar = "UF1";
#$DefaultTopCar = "XFG";
$DefaultTopCar = "XRG+LX4+LX6+RB4+XRT+RAC+FZ5";
$DefaultTopCar = "XRT";
$DefaultTopCar = "RB4";
#$DefaultTopCar = "FXO";
$DefaultTopCar = "LX4";
$DefaultTopCar = "LX6";
$DefaultTopCar = "RAC";
$DefaultTopCar = "FZ5";
#$DefaultTopCar = "MRT";
#$DefaultTopCar = "XFR";
#$DefaultTopCar = "UFR";
#$DefaultTopCar = "FOX";
#$DefaultTopCar = "FO8";
#$DefaultTopCar = "FXR";
#$DefaultTopCar = "XRR";
#$DefaultTopCar = "FZR";
#$DefaultTopCar = "BF1";
#$DefaultTopCar = "FBM";

doenst work!..any idea?

doenst work even if it look like that

#$DefaultTopCar = "UF1";
#$DefaultTopCar = "XFG";
$DefaultTopCar = "XRG+
$DefaultTopCar = "XRT";
$DefaultTopCar = "RB4";
#$DefaultTopCar = "FXO";
$DefaultTopCar = "LX4";
$DefaultTopCar = "LX6";
$DefaultTopCar = "RAC";
$DefaultTopCar = "FZ5";
#$DefaultTopCar = "MRT";
#$DefaultTopCar = "XFR";
#$DefaultTopCar = "UFR";
#$DefaultTopCar = "FOX";
#$DefaultTopCar = "FO8";
#$DefaultTopCar = "FXR";
#$DefaultTopCar = "XRR";
#$DefaultTopCar = "FZR";
#$DefaultTopCar = "BF1";
#$DefaultTopCar = "FBM";

Remove all your $DefaultTopCar lines except the line that has

$DefaultTopCar = "XRG+LX4+LX6+RB4+XRT+RAC+FZ5";

otherwise you're confusing the program telling it one type of car on one line, but then saying it's a different car on another line, and then another different car on another line.

A poor analogy;

telling a computer program that

a+4=7

and that

a=1
a=2
a=3
a=4

And don't have "XRG+ because that's unfinished (needs either another car type added along with quote mark and semi-colon (e.g. "XRG+XRT";) or removal of the plus sign, and addition of quote mark and semi-colon (e.g. "XRG";)