Oki C5300n User Manual page 101

You will not be able to save a gamma adjustment if:
> The gamma adjustment has not been named.
> Any of the values entered in text boxes are outside the acceptable
range (0%-100%).
> All of the text boxes are blank; there must be at least 0% and 100%
levels entered.
Gamma adjustments are stored in the printer's PPD (PostScript Printer
Description) file.
Ensure that the correct PPD file for your printer is selected - if not, you
may select it manually by clicking the Select... button.
6. Click Add-> to add your Custom Gamma adjustment to the PPD
file.
7. Click Save.
8. From the File menu, select Quit to exit the Oki PostScript
Utility.
To use the gamma adjustment when printing:
1. From your application's File menu, choose Print....
NOTE
MAC OS 9.X / CLASSIC > 101