I was wondering why sometimes I hit the contour button nothing happens, and then it works just nice. Found out that the lower section of the black contour button, or the fill button (both the same) do not react. When working fast it often happens, that I just click the lower section, with no reaction. Also I guess the whole button should be click sensitive, if I am not wrong. See video.
Bildschirmaufnahme 2023-08-13 um 13.27.55.mov