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Node Selection And Move

To select a node.


       1.To select one node: click the node, drag the mouse to form a box around the node.

       2.To select several nodes: drag the mouse to form a box around the nodes, or click the nodes one after another by pressing the Shift key.

To move a node


       1.Select the node

       2.Hold and drag the left button to move the node. (A node can be moved horizontally or vertically by pressing the Ctrl key at  the same time.