Magellan RoadMate 300 Reference Manual page 115

Selecting Destinations
Select the addresses you wish to use in your trip in the order you wish them to be
listed. When you have finished, select Done: [trip name].
You will be taken back to the Trip Planner screen. At this point you can choose to
route to your new trip.
Press Guide Me.
Select the trip you created.
Select the first point of the trip you wish to route to.
Select the desired Route Method.
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