Is this in the Editor or in the Game itself while running. It's not clear to me, but I believe you are meaning the editor right?
Can you use the Gizmo for the node? If you click on a Node in your Scene tab, then it should allow you to use a Gizmo that will allow you to manipulate the Node you have selected.
Take a look at my , see how my CSGBox has a gizmo on it, I can use it to move it with my mouse. You can also move and rotate your node.