After selecting Maps from chart selection panel, you can configure the chart in right panel. Following are the details of each field in right panel.
Title of the chart. This can be empty.
Select a field of type GPS Location from the App. You cannot configure the Maps view if there are no Location Fields in the App.
Once the Chart is configured, you can go to the Submissions view of the App and view the Maps.
You can also apply some filters to see only some data points on the Map. You can view the Maps in Full Screen and Download the raw data as well.