Oki LD670 User Manual page 108

Then press and hold down the FEED switch for at least one second to
accept the selection.
The printer prints the following when entering setup mode:
4. In setup mode, select "SETUP".
Press and hold down the FEED switch for at least one second to accept the
selection.
The printer prints the following upon your acceptance of "SETUP"
selection:
Setup
End
Default Set
Setup Print
Setup
Selection Item
Setup
Paper Setting
Return to Top Menu
Others
Serial Condition
Customize Value
Memory Switch
Paper Setting
Selection Item
Setup
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