When you add a document to a master document or create a new sub-document, a link is created in the master document. You cannot edit the content of a sub-document directly in the master document, but you can use the Navigator to open any sub-document for edit.
在主控文档中添加文档或创建新的子文档时，主控文档中会创建一个链接。不能在主控文档中直接编辑子文档的内容，但可以通过“导航”打开任何子文档进行编辑。