Magellan RoadMate 300 Reference Manual page 66

Trip Planner
A dialog box will appear, prompting you to enter information for the
address you wish to enter. The State can be either typed in or selected
from the pull-down menu. The City field uses autofill to assist you in
finding the city. As you type, the list of matching cities is narrowed
down. Once you have entered enough characters, select the city from
the pull-down menu after you have entered the first few characters.
Continue entering the required information. When you are finished,
select OK. A list of possible addresses is displayed. Confirm your
selection by selecting OK.
A new trip has been created with the address. This is because a trip
whose route has already been calculated must be altered manually.
Click on the new point and drag it onto the previous trip. The point is
added to the end of the trip.
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