Buick Regal Navigation Manual page 34

Press Heading Indicator to display
the Map View. There are three
indicator settings:
2D North Up Displays North
at the top of the map screen
regardless of the direction the
vehicle is traveling.
2D Heading Up Displays the
direction the vehicle is traveling.
The shaded triangle icon points
North.
3D Heading Up Displays the
same as 2D Heading Up, but the
map is in 3D.
Press to change the view of the
maps while using the navigation
function. The system offers a variety
of full and split views. Some views
are only selectable when route
guidance is active.
An alternative method to change the
view of the maps would be to press
the map mode icon.
Press Traffic to display the Traffic
Menu. Press the desired option.