I am working in EasyEDA Std, and have saved a Schematic with a new name (for a new revision of the PCB).  I then made changes to the Schematic but want those changes to be made and tied to the old PCB (as a starting point).  However I cannot find a way to link the new schematic to the old PCB, I can only start from scratch with defining a PCB size and placing all of the components again.  How do I copy over a PCB and use it with a newly named/saved Schematic so that when I "update PCB" they are tied together?  Thanks for any help. Art