http://www.newton-inc.com/dev/techinfo/qa/qa.htmprotoTransportHeader-based view?addedHeight slot. The height of the transport header will be increased by this amount.viewSetupFormScript method of your protoTransportHeader view. This works around a bug with protoTransportHeader:
self.stepChildren := SetUnion( self._proto.stepChildren, self._proto._proto.stepChildren, true );