I have a current project that works as intended.   I now need to add new features and remove features in a new design, but want to do so without affecting the current design.   Applies to both Schem Capture and PCB . Seems simple enough.   I've tried copy paste of files, Cloning, and there's a 3rd in there.   Nothing works.   Either the PCB does not link to the schematic or the original is altered when the new design is moving forward. What is the process/sequence to making a copy of both the schematic and PCB files, change the name, that will allow me to move forward with the new design without affecting the original? Thanks, DaveC