gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dNOPAUSE -dQUIET -dBATCH -sPAPERSIZE=a4 -dFIXEDMEDIA -dPDFFitPage -sOutputFile=outputA4.pdf LETTER.pdf
This gives me page size of 595 x 770 pts. How can I change the height to match 842 pts? Or how can I add that 72 pts padding to bottom of the page?