1. If required, set the desired main lines active (Setting active/passive main lines).
2. Ensure that you from the View menu, you chose Network editor.
3. In the Network window, right-click the Lines button.
The Lines context menu opens.
4. Select the Multi-edit > Main lines entry.
A query opens if the network contains passive main lines. Otherwise all main lines are deleted.
5. Confirm with OK.
The main lines are deleted.
