Thanks. But, it seems not to solve my problem. I guess you misunderstood my requirement. But, that's my fault.Sorry for my poor English that make you confused;)
My problem is that, I defined header with .CH, .LH ... macros, and use a .bp to start a section (or chapter ) in a new page. I don't want the header show in the first page of each section, in the following pages, it's there. Thanks Luke
