First, click on Create a Stream from the “Streams” section in your Agent Dashboard.
Enter a city or zip code to get started.
On the next page, click on one of the map options - Square or Polygon.
The Square Option looks like this - Click a point in the upper left-hand corner and hold down the mouse button, then drag your mouse cursor to the diagonal point on the lower right and let go of the mouse button to create the square/rectangle.
The Polygon Option looks like this - Click a point to start, making several clicks to create a perimeter in your desired shape, ending back at the first point.
Once you're done drawing your map, continue fine-tuning your options.