看help文件就好了吧
2.From the drop-down list, select one of the following choices:
Of Entire Library: The software overwrites instances of the From Cell name with the To Cell name. For example, all instances of …/lib/oldCell/symbol are renamed to …/lib/newCell/symbol.
Of New Copies Only: The software overwrites only the cellview references you copied from the original library. For example, only cellview instances of …/oldCell/symbol are renamed to …/newCell/symbol.