Dell BT-308 Owner's Manual page 91

To mark a road(s) to be avoided, tap on the road. A "No Entry" symbol
3
appears next to the road.
To clear a road, tap on the road again. The "No Entry" symbol
4
disappears.
NOTE:
To clear all marked roads, tap Reset.
When all roads to be avoided are marked, tap Navigate. The map
5
appears and revised instructions begin.
NOTE:
Road sections to be avoided appear on the map in purple.
To cancel a detour:
Tap Menu and then tap Destinations. The Current Route Options
1
screen appears.
Owner's Manual
89