Partial refresh the diagram

I think diagram, such as a organizational diagram, is bound to its underlying data model. If the data model has been changed, the diagram is refreshed automatically. Is this understanding correct? If user updated part of the organization tree and we would like to do just a refresh of the sub tree instead of refreshing the whole tree, is there a way to do so?

Yes, that is correct. You just need to remember to make whatever changes that you want all within a transaction.

Thank you for the quick reply. I just want to confirm with you. It is possible to do a partial refresh of the tree instead of refreshing the whole tree when there is a change on a subtree.

Yes, you can make whatever changes you want, whether adding or removing nodes or links. Such changes invalidate the diagram layout. Committing the transaction makes sure all invalid layouts are performed.