For “Command Help” menu items, all voice commands that are available for that system are listed.

Select Read to hear the commands in the list read aloud.
Voice Commands
Safe Driving
...
Turn Signals
The turn signals can be used when the ignition
switch is in ON .
...
Previous Destinations
DEST button
► Previous Destinations
Select an address from a list of your 50 most recent destinations to use as
the
destination. The list is displayed with the most recent destination at t ...