Oki LD670 Guía De Usuario página 116

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 "DEFAULT SET".
Quickly press the FEED switch twice (up to one second each) to move to
"DEFAULT SET".
Setup
End
Default Set
Setup Print
Setup
Selection Item
Setup
Default Set
↑
Setup Print
↑
Setup
End
Default Set
Setup Print
Setup
Selection Item
114