Pass page orientation info to the printer.
[read/write property] paperOrientation([out, retval] VARIANT_BOOL *orient) paperOrientation([in] VARIANT_BOOL orient)
If this property is true, page orientation info (portrait or landscape) will be passed to the printer.

The results depend on the printer driver, but this option generally only affects finishing equipment (e.g., staplers) and PS/PCL viewers.

resetParams resets this to its default value, which is false.

pdf.paperOrientation = True