138 > Macintosh OS 10.1.5 Operation3. From the Duplex screen, select the options desired.a. For Duplexing (printing on both sides of the sheet), selectPrint on Both Sides.b. Select which Binding you prefer. Normally, the first option isthe default.CollatingCollating can be carried out with or without a hard disk driveinstalled. However, installing an HDD will achieve greaterperformance.If the software application being used has a collate print option, it isrecommended to use only one collate option to prevent anyconflicts in printing, i.e. collate from the software application orcollate from the printer driver.The following instructions explain how to select collating using aprinter driver.1. To access, first select your desired OKI printer.NOTES• Duplex printing can only be carried out on standardpaper sizes and paper weights between 20 and 28 lb. (75and 105 g/m ²).• The optional duplex unit must be installed in the printerand enabled before duplex printing can be carried out.• Paper must be loaded into the paper tray with the printside facing upwards. The multi purpose tray cannot beused for duplex printing.
