The PC_OCD_LANDSCAPE box contains the command or commands which the Universal Printer Driver issues to print output in landscape mode. A printer should only support the landscape-mode command if it also supports device fonts for both portrait and landscape modes.
The Diconix 150 Plus printer does not support commands which set the page orientation; therefore, the PC_OCD_LANDSCAPE box is empty.
For the HP LaserJet IIP, the Landscape Orientation command (ESC&l1O) is required to render output in portrait mode.
To specify the Landscape Orientation command, type the following in the PC_OCD_LANDSCAPE box:
\x1B&l1O