About Highways
Highways let you simplify a schematic visually by showing the path of multiple wires as a single line. When you include a wire in a highway, it affects only the graphic display of its path.
To create highways you can:
Sketch the highway directly on the drawing, or
Use an existing wire path.
To add wires to a highway you can:
Route a wire to a highway as the wire is being created, or,
Reroute an existing wire to a highway.