How to run traces to second row of a double header (Mega 2560)

Another (but more complex!) option is to switch out the pads with this header pin (for the raspberry PI but the connector is generic if fixed length.) which has oblong pads intended to allow you to route wires between them. The down side is you need to modify the part to add the connector which isn’t all that easy unless you are familiar with making parts.

Peter

Peter