How to use 3D curve at Free style in Catia V5.
How to use 3D curve at Free style in Catia V5. 3D curve is a command of freestyle in Module: Shape and image
Accepted answer
I did a search based on your question, and found this YouTube video by m1turbo: https://www.youtube.com/watch?v=W4prkp57YCE&feature=emb_title