How do I specify what information appears in the map pin balloons?
Under Visualize > Map, click “Configure Info Window” and select the template to use. The default template lists all the column names and their values for that map pin. Other templates are designed to show photos, links and more. Select which column’s values should be used to populate the parts of an information balloon template. For example, for “photo link” use a column where each row has a link to a photo in order to include those photos in the map balloon. When the “Export to KML” link is clicked, the current configuration of the info window will apply for the exported data.