I need to draw a perfect symmetric "S" in a graphic.   I used the pen tool with pen mode and smart mode and created the shape that I needed - well, almost.  Is there a way to create an S shape, where you do not need to adjust every node separately? Is ist possible to link nodes symmetrically or to distribute the nodes under symmetric constraints, so that I do not have to worry about whether the middle part is really in the middle etc.   What would be your approach?