Multi-pin (Steiner) routing

Multi-pin (Steiner) routing. A net usually connects more than two pins, and the trick is to make the branches share metal. This is one net: a root and several pins, each reaching the root by an L that can bend two ways.

• Tree wire under target - where two pins' wires run along the same track, the metal is shared and counted once. Click a pin to flip its L so the routes funnel onto common trunks (drawn orange). That shared trunk is what makes a Steiner tree short: routing every pin independently (a star) uses far more wire than letting them share a spine.

Funnel the routes to share, bringing the total under target, then Submit design.