Example:
Geometrical Set.1\Point.1 = pointtangent
(Geometrical Set.1\Spline.1, direction (10mm,10mm,10mm))
Example:
Geometrical Set.1\Point.1 = pointtangent
(Geometrical Set.1\Spline.1, direction (Geometrical Set.1\line3))
Example:
Geometrical Set.1\Point.1 = pointtangent
(Geometrical Set.1\Spline.1, direction (`zx plane`))