orientation swith between pages for ODS RTF

In SAS forum, Cynthia@sas give a trick on how to do orientation switch.
I copied the code at below:

It should be noted that this trick is specific to ODS RTF.

options orientation=portrait;
ods rtf file='twoway.rtf';

** first procedure;

options orientation=landscape;
ods rtf;

** second procedure;

ods rtf close;

From: http://support.sas.com/forums/thread.jspa?messageID=15691&tstart=0#15691