Make Frame by Faces (Edges,Curves).
Hide/Show lines.Hide Intersect Lines of Objects.
Select edges for Make Faces
Mirror Objects by 1 click.
Paint Material to Face in Group,Component.Detele Material in Object.Replace Material.Rotate,Move,Align texture.Reverse Face.Get area of material.
Set Scale Definitions for Components or Groups.
s4u toComponents allows convert objects to components.
Weld Edges to Curves.