On the navigation screen, the Trail corresponds to the area in which the agricultural application actually took place, being filled in on the screen in green according to the width of the Implement currently configured.
To turn the trail fill function on or off, in the system IsoView Excuse me ISO 30 there are two options.
Application Button
O Application Button is used to update the status of the trail on the navigation screen. Each press of the same causes the status to alternate between enabled and disabled.
Trail Button
at the bar Side Buttons – Left the trail touch sensitive button is present. As with the apply button, each time the button is pressed, the state of the trail is toggled between enabled and disabled.
If trailing is enabled, the button will remain in its active state. 
. Otherwise in idle state 
.
