The CM_OCD_UNI_DIR box contains the printer command or commands which enable unidirectional printing. (In order to enable unidirectional printing, the RES_BO_UNIDIR box in the fBlockOut resolution dialog box must be checked. If this box is not checked, the Universal Printer Driver will ignore these commands.)
For the Diconix 150 Plus printer, the Unidirectional Printing On command (ESCU1) enables unidirectional printing.
To specify the Unidirectional Printing On command, type the following in the CM_OCD_UNI_DIR box:
\x1BU\x01