In this area, you select a vertex in the graphical part of the assembly, which will be taken into account for the calculation and creation of the required curve; splines are positioned at the head of the creation tree. Multiple vertices can be selected to generate as many curves as required.

To delete a vertex, simply select it and press the '' key.Delete'' on the keyboard. You can also right-click in the area and choose to delete all vertices or just the selected one.

Curve obtained with 1 vertex selection :