[Therion] both plan and extended elevation on the same pdf page

Hi all, I have a few litlle caves to import in therion, it works fine, on 2 files, but I look for a solution to put both plan and extended elevation on the same pdf, I found the wiki page http://therion.speleo.sk/wiki/doku.php/fr:tbe:wiki7, 7.1 Output, but I don't understand, how the process works. Do you test this solution or do you have an other track ? Regards, C.S.