altium designer 自动扇出功能

http://wenku.baidu.com/link?url=UJLUQWqm2KwzQzcWxhgsL-Xk4wcUBl-TIB0GAWVD9lC2jrDiRHin0cln-4fMiK1Ku934CvlB-tV7FGEcXzfQL6uC4M58TpnZYCPlbfA4XgW