Comment 3 for bug 170826

Can you please provide the precise way (keys, clicks, anything) of how this should work?
It is possible for generating new nodes; as Bulia mentioned, for existing nodes it is not possible (just consider what happens when dragging a node on a corner. So I envision something like ctrl+alt+shift dragging a new node off an existing node, or with some other special key binding...
Thanks,
Johan