I am using Kicad (5.1.4) and would like that the schematic contains all the component wiring required for a PCB board as well as the wiring for components external to the PCB board (such as switches, displays etc.).
Previously I have set up an additional project for the external wiring. However, trying to manage both projects (e.g. ensuring consistency) is error prone.
I have tried not associating footprints with the external components. This seems to work in that Pcbnew does not attempt to layout the external components - meeting my goal - but still comes up with errors about the missing footprints. Secondly, it does not seem to be a “transparent” method in that it is not immediately obvious from the schematic which are the external components.
Is there a better way, for instance using hierarchical schematics?