Thx for the infos and precisions!

Thank you, just found this, looks very useful in certain circumstances

-James Elliott

Here are three presentations:
1- All edges are hidden (aesthetically, I don't really like it)
2- All edges are visible
3- I control the tangent edges and seam edges easily and quickly with the help of "tangentStyler.js" and type and style browser. For a result that suits me aesthetically for a presentation or a technical document.