To adjust the screen contrast on the Datamax M, I or H class printer, press and hold the “Menu” button on the far left side. As you hold down the Menu Button the display contrast will rotate from the lowest setting to the highest and back again. Just let go of the menu button when the contrast is adequate.
The new I Class Mark II does have a minor nuance. When the Menu Button is pressed and held the Display Contrast Menu will come up. Use the up and down arrows to change the contrast value then press Enter to save.
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