Magellan RoadMate 700 Reference Manual page 31

Selecting a Destination
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You can now set a priority for this address. Select "1st", "2nd" or
"3rd" to set the rank of this address in your Address Book. All
addresses with a 1st priority will be displayed at the top of the list,
followed by 2nd and 3rd. This priority supersedes the alphabetical
order.
Select "Save" and press Enter to save this address to your address
book.
Select the 'List Addresses' option from the Book Screen.
Scroll up and down the list to pick the address you want to set as
your destination and press Enter.
Select the desired Routing Method and press Enter. The route will
be calculated and the Guidance screen will be displayed.