It's possible to make calls to the web service from a client application, which forces the use of the GdPicture converter. First, the web service needs to be configured.
Copy the GdPicture converter node and paste a copy underneath. Rename it to GdPicture High Fidelity and set
fidelity to High:
After that, any calls to the web service requesting “High” fidelity conversion will use the GdPicture converter, thanks to this second configuration element.