Hi Rhawk,
Thanks for the update.
It is possible with Essential diagram to group the new diagram object to the bottom of existing diagram object. You can also detach them by ungrouping it.
Please refer the video file that demonstrates on grouping the new diagram object to the bottom of an existing diagram object.
http://websamples.syncfusion.com/samples/Diagram.Windows/F70766/Video/main.htmYou can also use SendToBack() method of the diagram model to send a node back to another. Below is the code snippet.
[C#]
this.diagram1.Model.SendToBack(dgmobject);
Please refer previous post for grouping and ungrouping the diagram entities programmatically.
Sample referencePlease refer the DiagramBuilder sample that shipped with Essential diagram in the below location that accomplishes the above said feature.
[Install drive]:\Documents and Settings\UserName\My Documents\Syncfusion\ EssentialStudio\x.x.x.xx\Windows\Diagram.Windows\Samples\2.0\In Depth\DiagramBuilder
Please let me know if this meets your requirement.
Regards,
Jaya