Technical Reference
Page 270
... If Screening is set to False. PictureGrade works in conjunction with previous Lexmark laser printer drivers. PrintDarkness specifies the value of Screening by the interpreter for all models except the Optra C710, Optra M410, Optra T family, and Optra W810. This does not change the user default printer settings for print quality, which are : 1 Lightest 2 Lighter 3 Normal 4 Darker 5 Darkest...
... If Screening is set to False. PictureGrade works in conjunction with previous Lexmark laser printer drivers. PrintDarkness specifies the value of Screening by the interpreter for all models except the Optra C710, Optra M410, Optra T family, and Optra W810. This does not change the user default printer settings for print quality, which are : 1 Lightest 2 Lighter 3 Normal 4 Darker 5 Darkest...