We made a slight change to the look of the Edit Landmarks section. Now you can select the circle or polygon tool from the new icons within the preview map. All of the functionality and options (color, altitude, etc.) remain the same.
Click on the Polygon Icon to create a new polygon landmark:
Click the Circle Icon to create a new circle landmark:
If you need to start over/redraw either a polygon or circle landmark simply click on the associated icon again and the map will clear.
You will also notice the new Street View option in the preview map. Simply drag the Orange Guy to the map to enter Street View and see a realistic view of the location:
These new changes should help make creating and editing landmarks easier and more precise.