Hello,

Maybe you are referring to the functionality typically known as "Connector Lines"? You can use your Visual Studio design time surface and pick one of the presets supporting this out of the box, for example the "Classic Tree With Lines Connectors" preset. The preset selection dropdown is available directly on the UltraWebTree Smart Tag in the Design Time surface.

Alternatively, you can try setting the "WebTreeTarget" property of your treeview instance to "ClassicTree" and see if it works fine in your scenario.

Please, let me know if I am missing something or the suggestions do not work in your project.