In the example below, the white box is the centering window. The centering window has been set to 20% left, 30% right, 8% top, and 25% bottom. Since Bar Code 1 passes through the centering window, it will be read. Bar Code 2 does not pass through the centering window, so it will not be read.

0%

Bar Code 1

10

20

Bar Code 2

30

40

50

60

70

80

90

100

0

10

20

30

40

50

60

70

80

90

100%

Note: A bar code needs only to be touched by the centering window in order to be read. It does not need to pass completely through the centering window.

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