Creating Relationships in the Graphic Area 
Use
You can create relationships between network activities in the graphic area of the project planning board.
Procedure
All relationships are displayed in the graphic area and the mouse pointer takes the form of a pencil.
The activities are connected by a line.
Deactivate the connection mode by clicking outside the graphic area. The following figure shows you the way to draw the line to create the different types of relationships.
The connect mode is switched off.