You can define a PCB design rule on a wire in the schematic that can be transferred to the PCB document. Is that what you mean?
Thank you for your reply. I don't know how to define a PCB design rule.
I found the Solidworks Electrical might be better for me to draw the electrical schematic and define the wire dimension&BOM, so I'm studying the Solidworks Electrical now. Thank you anyway!
Gordon, what you are describing is not a PCB Schematic but rather an electrical schematic, using terms defined by SOLIDWORKS.
You should take a look at SOLIDWORKS Electrical as this sounds exactly like what you are looking for.