Lexmark 4I3 - Manual (Page 95)

Adjusting the Forms Thickness Setting
To adjust the lightness or darkness of the print, you must increase or
decrease the gap between the print head and the platen rod. This
distance is automatically set for you by the Automatic Forms
Thickness Adjustment (AFTA), but you can make corrections to the
distance if the print output is not as you desire. It is up to you to
decide if the print is dark (or light) enough to meet your
requirements.
To adjust the forms thickness setting with the F2 forms device, follow
these steps:
1. The forms thickness setting must be adjusted when the printer is
printing or has printed and is ready. Press Start, if needed, to
have the printer display
2. To make the print darker, press Darker.
The printer displays
The print head moves closer to the paper, and the print becomes
darker.
Note: The print may not get darker if the ribbon is worn or if
there is a problem with the print head.
3. To make the print lighter, press Lighter.
The printer displays
The print head moves farther away from the paper, and the print
becomes lighter.
READY <A>
LIGHT | -------| DARK
LIGHT | -----------| DARK
Chapter 1. Setting Up the 4230 Printer 1-73