Selecting and deselecting nodes by shift-clicking

 

You can select nodes, perhaps in scattered locations within a window, using this technique.

1. Select a node.
2. Hold down the shift key and continue to select or deselect individual nodes by clicking the left mouse button.

   If the clicked node was selected, it is deselected; if the node was not selected, it is added to the current selection. Any other selected nodes or arc are not affected.