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1. Press MENU repeatedly until PRINT MENU appears on the display.
2. Press ITEM + repeatedly until DUPLEX appears on the display.
3. Press VALUE + once to change the setting from OFF to ON.
4. Press SELECT to engage the new setting.
An asterisk will appear at the end of the second line.
5. Press ON LINE to save the setting and exit the menu.
Step 3: Activate the Duplex Unit in the Driver
Windows PCL Driver
1. Click Start → Settings → Printers.
2. Right click the OKI C9200 or C9400 PCL driver icon, then click Printing Preferences
(Windows 2000), Properties (Windows Me, 98, 95) or Document Defaults (Windows NT
4.0).
3. In the Paper tab, click Device options.
4. Click Duplex option unit to select it, then click OK.
5. Click OK, then close the Printers dialog box.
Windows PostScript Driver
1. Click Start → Settings → Printers.
2. Right click the OKI C9200 or C9400 PostScript driver icon, then click Properties.
3. To engage the duplex unit:
Windows 2000 and NT 4.0:
a. Click the Device Settings tab.
b. Scroll down to Installable Options and click Duplex.
c. Under Change 'Duplex' Setting, click Installed.
Windows Me, 98 and 95:
a. Click the Device Options tab.
b. Click Duplex.
c. Under Change setting for: Duplex, click Installed.
4. Click OK, then close the Printers dialog box.
Macintosh Driver
1. Activate Chooser from the Apple menu.
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