It's not currently possible to add custom labels to the map on the MapStand platform (Community / FREE version).
However, this functionality is available in our commercial offering, MapStand HUB. For more information, please take a look at https://www.mapstand.com/mapstand-hub/
If you'd like to discuss upgrading to MapStand HUB, please email us at email@example.com
Prospects and Leads / Accumulations are automatically labelled. They are scale dependent and will appear as you zoom in.