Oki PT330 User Manual page 319

5. Dreimaliges Drücken des FEED-Knopfes (zur Auswahl von 3. Print
Density) löst den Druck der unten stehenden Druckdichte-Optionen aus.
Print Density
1.70%
2.80%
3.90%
4.100%
5.110%
6.120%
7.130%
<Set>
Press FEED button for the number of times
as the same as your selecting item, and
wait more than 1 second.
<Return>
Continue to press FEED button more than
1 second.
<Setup Menu>
Continue to press FEED button more than
3 seconds.
100%
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