Dell Axim X3i Owner's Manual page 90

When all roads to be avoided are marked, tap Navigate. The map
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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.
Tap Add Detour. The Detour Around screen appears, listing the
2
revised roads on your route.
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Owner's Manual