Oki LD670 User Manual page 87

6. Select "PRINT DENSITY" as your option.
Press the FEED switch briefly (one second or less) three times to move to
"PRINT DENSITY".
Then, press and hold down the FEED switch for one second or longer to
accept the selection.
The printer prints the following when you accept the selection of "PRINT
DENSITY":
Print Density
↑
Print Color
↑
NV Graphics Memory
↑
User NV Memory
Return to Top Menu
Return to Up
Low Power
Max Speed
BK Density
Print Density
Print Color
NV Graphics Memory
User NV Memory
Selection Item
130% (Darkest)
130% (Darkest)
125%
120%
115%
110%
105%
100%
95%
90%
85%
80%
75%
70% (Lightest)
Selection Item
Print Density
85