Create an enum node in the DM with a few choices.
Create a new link to that node.
Edit one of the displays, adding a new choice.
Notice that the display of the enum choices is only updated in the location where you right-clicked to open the edit menu. To display the updated enum choices in both links, you have to re-open the DM window.
This is confusing to the user. The display should be updated for all links.