Joined: 26 Apr 2004 Posts: 4650 Location: Raleigh, NC, USA
Took a while to locate a reference manual.
For AFP printing, the PAGEDEF resource determines the orientation of the print data. The PAGEDEF reference can be found here in the PSF V3R4 for z/OS: User's Guide. Not knowing your exact printer model or paper size, it looks like you may want to try PAGEDEF=A06462 (64 LPP Portrait) or PAGEDEF=A08682 (86 LPP Portrait).
The FORMDEF resource determines paper source, and simplex/duplex printing styles. The FORMDEF reference can be found here in the PSF V3R4 for z/OS: User's Guide. Looks like you may want FORMDEF=A00010 (no duplex) or FORMDEF=A00011 (normal duplex).