I'm creating footprint which is socket for automotive relay. Such socket consists of 4 (or 5) faston connectors. Each faston connector is custom footprint by itself. Is it possible to use custom footprint (for one connector) as component of other custom footprint (relay socket)? I've tried to place part from "PCB Libs" into PCB Lib project, but EasyEDA complains that such parts could be used only in PCBs! Also, I can not find "group objects together" functionality in PCB Lib editor.