Oki C3100 User Manual page 38

Click the Save button to save the new setting or the Undo button to
undo the change. Use File|Exit to return to the Printer Setup Tab.
You can access the printer menu settings window direct by clicking
[Start], [All Programs] and selecting Okidata|OKI C3100|Printer Name
Printer Settings.
NOTE
THE STATUS MONITOR > 38