Ricoh Priport DX 4640PD Operating Instructions Manual page 46

PostScript3 printer driver - Setting Up for Printing
A
Rotate the envelopes 180 degrees and place them in the paper feed tray as
shown in the illustration below.
1
*Paper feed direction
B
Set "Rotate" to "180 degrees" on the [Advanced] tab in the printer driver.
C
Click [OK] to start printing .
The image is rotated and printed on the envelopes.
42
GRENVE1E