User Guide

2020/3820 User’s Guide 3 - 7
Centering Window
Use the centering feature to narrow the scanner’s field of view so the scanner
reads only the bar code you want. When centering is turned on, the scanner only
reads codes that intersect or are contained within the centering window you set
up. At least part of a bar code must be within the window to be decoded or output
by the scanner.
To change the left or right edge of the centering window, scan Centering On, then
scan one of the following bar codes. Then scan the percent you want to shift the
centering window using digits on the inside back cover of this manual. Scan
Save. Default Centering = 40% for Left, 60% for Right.
The figure below illustrates the percentage range from 1 to 100%.
Left of Centering Window
Right of Centering Window
* Centering Off
Centering On
20%
30%
90%
80%
40% 60%
70%
10%
0%
100%