The Overlap parameter is used so that there is an overlapping area between each of the navigation tabs, intentionally by the user. One of the most common examples of its use is in spraying, so that the overlap compensates for possible application failures due to wind drift..
The overlap value is measured in centimeters, on the same line as the implement bar, transversely in relation to the tractor axis.
Considering an implement with a width of 30 meters, 2 examples of the use of the Overlap parameter are presented.
Example 1 – Overlap = 0 cm
In the case where there is no overlap, the distance between navigation tabs is equal to the width of the Implement, as shown in the following image.
Example 2 – Overlap = 20 cm
When the overlap is greater than zero, the distance between the guides will be the difference between the width of the Implement 
and the value set as Overlap 
. In the example: (30.0 m – 0.2 m) = 29.8 m 
. The figure below illustrates the effect of overlapping the trail on parallel guides..
The Overlay parameter configuration screen is shown in the image below, including the self-explanatory figure of its meaning.
