Lexmark 4I3 - Manual (Page 221)

4. If the default value does not give the best print sample, press
Scroll or Scroll until the printer displays the same number of
arrows that were printed beside the best print sample line. Press
Enter to set this as the new default value. The printer then
prints another line to demonstrate the new default value, and the
test is complete.
or
Press Stop to end the test without changing anything and return
to the Operator Print Tests menu.
or
Press Cancel Print to end the test, exit test mode, perform a
partial reset, and have the printer display
5. If you changed the value, check the last line printed for
acceptable quality and alignment.
If the quality is not acceptable, return to Step 3 on page 5-19,
otherwise, go to Step 6.
6. Press Cancel Print to make the printer ready or Return to make
the printer not ready (see “General Test Instructions” on
page 5-1).
READY <A>
Chapter 5. Tests 5-21