Hi Kenneth,
Thanks for using Syncfusion products.
We suggest you to refer the “Expander” sample from the Dashboard to achieve your requirement. Please refer the below dashboard location of “Expander” sample.
Here is the path:
..\..\AppData\Local\Syncfusion\EssentialStudio\{installedVersion}\Windows\Diagram.Windows\ Samples\Getting Started\Expander
Please let us know if you have any queries.
Regards,
Naganathan K G