To Delete Diagram Cables
You can delete a cable and its conductors, or delete the cable and reassign the conductors as wires.
1. Click to select multiple cables to delete. A list of wires and cables in the diagram appears.
2. Select the name of the cable to delete. The selected cables with the wires and cable symbols are highlighted.
3. Click Edit > Delete to remove the cable and conductors.
or
Select all the cable conductors using the Cable Conductor filter, right-click and select Delete from the shortcut menu. This deletes the cables as well as the conductors.
4. To restore the deleted cables, click Edit > Undelete or right-click and select Undelete from the shortcut menu.
* 
Deleted objects are restored only if you perform an Undelete operation immediately after a Delete operation.
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