Hi Aditya,
We does not have any specific property in symbol palette to allow drag and drop in diagram. We suspect that you set diagram constraints or diagram tools as None. So that you cannot able to drag and drop a node inside the symbol palette. If you set diagram constraints or tool as None means then change it to Default.
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public diagramcontraints: DiagramConstraints = DiagramConstraints.Default;
public tool: DiagramTools = DiagramTools.Default; |
In case if the issue still persists, please share us a simple sample illustrating issue. This will help us to provide solution at earlier.
Regards
Aravind Ravi