GGU-2D-SSFLOW: "Define pipes" menu item

Left-click system nodes to define pipe elements which can then be assigned a material number after pressing the [Return] key. The defined pipes are shown with the appropriate material number in the graphics. The colour and width of the lines can be edited using the "Graphics preferences/Pen colour and width" menu item.

If you need to delete individual pipes or sections of them, click the system node again, accept with the [Return] key and exit the material number dialog box by pressing "OK". Click the "Delete old pipe" button until all sections of the marked pipe are deleted and then define the new pipe if required. If you exit the box by pressing "Cancel" before you are finished, the undeleted pipe sections will remain in place.