VMS Help CONVERT, /DOCUMENT, CDA Base Service Converters, PostScript Output Converter, PAPER_LEFT_MARGIN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    PAPER_LEFT_MARGIN value specifies the width of the margin
    provided on the left-hand side of the page. The default value is
    0.25 inch (in). Other valid units of measurement are: centimeters
    (cm), millimeters (mm), and points (pt or po).