Hi DWw,
As we informed you in another incident (165757), Currently, we don’t have support to add UML Class Shapes in symbol palette. We cannot render a UML class shapes in the symbol palette.
We have logged “Support to add UML shapes in symbol palette” as a feature request. We will implement this feature in any of our upcoming release. Please find the feature description below.
Now, you can now track the status of your request, review the proposed resolution timeline, and contact us for any further inquiries through below link.
Regards,
Gowtham.