Correct contrast setting is important because it affects how well your bar codes scan and how long your printhead lasts. You can use a verifier to check bar codes for contrast.
1.From the Main Menu, press L or R until you see
MAIN MENU
l Setup r
2.Press E. Press L or R until you see
SETUP
l Contrast r
3.Press E. You will see the current setting, for example:
Enter contrast
4.Press L or R to change the contrast. Pressing L lightens the print; R darkens the print.
5.Press E to select the displayed value. Press U if you want to exit to the Main Menu.