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What I understand and practice is to use the same software, in which you enter the schematic for PCB, should be used. Because in this way there is less or no chance of drawing some wrong connection or no connection at all. (if you export it to some other package then, there will be no problem). But I mentioned it again that if you design the PCB from the netlist generated from the schematic and later PCB is practically verified, then there will be left no chance of error in documentation as far as schematic is concerned.