Lexus 2003 LS Owner's Manual page 539

Destination Input by Previous Starting Point
"Previous starting point"
Touch the
switch on the Destination screen.
The screen changes and displays the
map location of the previous starting
point and the route preference. (See "(a)
Entering Destination" on page 25.)
If you have not used the navigation yet, the
"Previous starting point"
switch is
dimmed.
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