Add & Delete A Node

       Command:

       Menu【Node > Add】                                             Node Editing Bar  

       Menu【Node >Delete】                                          Node Editing Bar

To add a node

     Steps：

      1. Enter the node editing mode.

      2. Click on the location where you are going to put the new node.

      3. A black dot appears in this position.

      4. Click Menu【Node > Add】.

       Or by double click the left button.

To delete a node

       Steps：

      1. Select a node.

      2. Click Menu【Node > Delete】.

      Or by double click the left button.