Buick Regal User Manual page 52

The waypoint symbol marks one or
more set waypoints.
A waypoint is a stopover destination
point added to the planned route.
The estimated time and distance to
the destination are displayed.
If waypoints have been added to the
current route, each waypoint
destination displays estimated time
and distance.
This symbol indicates that the map
view is North up: North up displays
North at the top of the map screen
regardless of the direction the
vehicle is traveling.
Select this screen symbol to change
the view to Heading up or 3D.
This symbol indicates that the map
view is Heading up.