How can I change a part without ripping up copper?  If I swap out a resistor, just a value change, when importing to PCB, the part is place outside the PCB outline and must be re-placed.  The traces may or may not be there, but regardless, this is very inconvenient.  On my office (high end)  PCB program, I would import the part into the library, swap the part out, then update the part on the schematic with new parameters.  If I did not do this, a new unique part identifier would be generated (even if it had the same refdes) and my PCB guy would have to re-place the part.  Of course, these parts had to have the same footprint and pin numbers. Is there any such thing in EasyEDA? Thanks, Bob