How to get listing alert by polygon search

1) Go to the search listing page and click on Map. 

2) Then click Draw Custom Search.

3) Draw a shape on the map for the area you want to search. 

4) Then click on the Saved Search button and save your search.

5) Then go to your saved searches list and check the listings under your saved searches.

For example, see below:

Note: You have to save a new search after editing the polygon. Also In mac, it is working by click + Hold + Drage.