The operating modes of the network model
                                        Visum provides several possibilities to model a network. You can create, edit, and delete network objects or set them active or passive. The Network editor window provides three different operating modes.
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 Insert mode - 
                                                
 Edit mode - 
                                                
 Spatial selection mode 
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                                                         Note: If you cannot execute an instruction step, check that you have selected the right operating mode.  | 
                                                

