Turn 1 = first sausage curb (orange one)Try to keep two wheels within track limits at all times! They are the standard rules. Where is there cutting opportunitys? ascari?
Turn 3-4(2nd chicane) = little sausage and big sausage curb
Lesmo1-lesmo2 = exit curbs
Ascari = 1st apex, 2nd apex, 3rd apex and the exit curb
In short, every single corner apart from Parabolica! That's why a gain is almost a second in such short period.