Lexmark 4I3 - Manual (Page 219)

Bidirectional Adjustment
You can adjust dot registration and print quality for characters
created using bidirectional printing. The bidirectional alignment may
need periodic adjustment to maintain print quality.
To change the bidirectional alignment, follow these steps:
1. Enter the Operator Print Tests (see “General Test Instructions”
on page 5-1).
The printer displays
2. Press Scroll or Scroll until the printer displays
3. Press Enter or Start to begin the test.
The Ready indicator goes on and printing begins. The test
prints samples using alignment values higher and lower than the
default value. The print sample using the default value is
indicated with an asterisk (
* ). The alignment printout is
complete when the Ready indicator goes off.
The printer displays
OPERATOR PRINT TESTS
Printer Demonstration
OPERATOR PRINT TESTS
Bidirectional Adjustment
Bidirectional Adjustment
Chapter 5. Tests 5-19