The XML panel shows the latest response in the XML format.
You can edit the response to assert potential responses from the service. Right-click in the editor and select Edit.
To check if the response data matches the web service specification, right-click the XML panel and select Validate from the context menu. The editor will check the response data and report about errors, if any:
This command works for WSDL services.
For other services, the command checks if the response data is well-formed XML data.