The additionalTooltipFields property and functionality will be available in Splunk Cloud v9.0.2208 and Splunk Enterprise 9.0.1+ upcoming releases. This did appear previously in the docs at https://docs.splunk.com/Documentation/SplunkCloud/latest/DashStudio/chartsMap and https://docs.splunk.com/Documentation/SplunkCloud/latest/DashStudio/objOptRef plus the Splunk Enterprise equivalents but has been removed for now and will be re-added once these versions are released. ... View more