Most operations in rigiedit work on a current selection of nodes or arcs in a window.
Tip: The current selection is highlighted even if it is not within the active window.
To select and deselect nodes:
All visible nodes in the canvas become selected and highlighted. The message area indicates the number of nodes that are selected. As you select these nodes, you may also see them highlighted in other windows, such as the overview window.
All nodes become deselected. You also could choose None from the Select menu.
All the nodes that are either completely or partly inside the selection rectangle become selected.
The node (or arc) becomes selected and all the other nodes and arcs become deselected.
Note: Only one arc can be selected at a time.
If the node was selected, it is deselected; if the node was not selected, it is added to the current selection. Any other selected nodes and arc are not affected.