This page has settings for the Map box.
Select a Borders set from the list of overlays to be shown as plain grey borders with no fill colour as a background to the map (not available for Areas maps).
The Info Box is valid HTML to be used to display a popup window when the user rolls the mouse over a location icon. Placeholders may be used to include any value from the corresponding location record (e.g. #FieldName#).This can be overridden for each defined layer.