Olivetti d-Color MF45 Operation Manual page 591

Utility
7
Fold the paper in half while aligning the corners of the printed test pat-
tern.
8
Check the angle of the horizontal lines in the test pattern.
– If horizontal lines A and B are angled as shown below, touch [–] to
reduce the value of q (between –1 dot and –10 dots).
– If horizontal lines A and B are angled as shown below, touch [+] to
increase the value of q (between 1 dot and 10 dots).
MF45
13
13-71