Deleting all polygons
                                        1.  In the Network editor window, click the Edit mode icon 
.
2. In the Network window, click the Polygons button.
3. Make sure that no polygon is highlighted.
4. Right-click in the network display.
A shortcut menu opens.
5. Select the Multi-delete entry.
The Delete polygons window opens.
6. Select the desired options.
| 
                                                         Element  | 
                                                    
                                                         Description  | 
                                                
| 
                                                         Delete background polygons  | 
                                                    
                                                         Via this option you can delete all background polygons of the network display simultaneously.  | 
                                                
| 
                                                         Delete legend polygons  | 
                                                    
                                                         Use this option to delete all legend polygons of the network display simultaneously.  | 
                                                
7. Confirm with OK.
The selected polygons are deleted.

