My default color of welding is orange, but in this case weld appears blue.
What does it means?
In picture i used a "Butt weld", side 1 chain and side 2 surface.
weld is created as Surface feature. "Blue" color is default color of surface features. I hope you can assign any color to weld surfaces.
Why Creo use surface and not solid welding?
It's just because it can't connect the two sides with a solid feature or maybe is mine setting?