Differential pair length tuning issue

[Kai_Ye]

Hi,

I am using KiCAD 5.1.6 and having some trouble tuning the length of the differential pair. It just did not change anything. I wonder if I did the wrong setting?

Any enlightenment would be appreciated, thanks!

[der.ule]

you have to click where you want the beginning of the mitters (wavy tracks) and slide to one side or the other, try maybe to use a bigger target length to get an idea how does it work.