The map types SATELLITE and HYBRID support a 45° perspective imagery view for certain locations (only at high zoom levels).
If you zoom into a location with 45° imagery view, the map will automatically alter the perspective view. In addition, the map will add:
A compass wheel around the Pan control, allowing you to rotate the image
A Rotate control between the Pan and Zoom controls, allowing you to rotate the image 90°
A toggle control for displaying the 45° perspective view, under the Satellite control/label
Note: Zooming out from a map with 45° imagery will revert each of these changes, and the original map is displayed.
The following example shows a 45° perspective view of Palazzo Ducale in Venice, Italy:
Example