Motorola DS3578 Product Reference Manual page 39

The digital scanner can also read a bar code presented within the aiming pattern but not centered. The top
examples in Figure 2-5 show acceptable aiming options, while the bottom examples can not be decoded.
0 1 2 3 4 5
0 1 2 3 4 5
Acceptable and Incorrect Aiming
Figure 2-5
0 1 2 3 4 5
0 1 2 3 4 5
Scanning 2 - 7