Currently, when using multiple schematics and you update the PCB, all parts from all schematics will be added to the PCB. Instead, I would like to be able to associate a PCB to a given schematic, so the PCB can be updated from the relevant schematics only. We could have: * Schematic A -> associated to PCB 1 * Schematic B -> associated to PCB 1 * Schematic C -> associated to PCB 2 So if I modify Schematic C, only PCB 2 will be affected. If I modify Schematics A or B, then only PCB 1 is affected. The association could be a many-many relationship so more than a PCB can be associated to a schematics, in case you need different PCB from the same set of schematics. To make it simple for people who don't need the feature, the default could simply associate all PCB and schematics in a project, just like EasyEDA is behaving now. Renaud Renaud