Every time when you add a new entity the pin will be added with different color.
Multiple pin options are also available to differentiate multiple entity (legend) records, options will be listed by clicking on existing pin.
You can change the pin color and its shape by clicking on the pin of any entity. Select different pins for the multiple entities to differentiate the records on the map. 
You can also add your custom pushpin icon by clicking on the plus + You need to select the SVG file.