From the tree or from the 2D representation, select Net1.
Important:
If the selected net is already associated with wires or cables, they are highlighted from the tree.
Select
Net/Wire Links from the Electrical toolbar.
Tip:
You can also select this command from the menu bar (via Insert > New... > Net/Wire Links).
Select Wire1 and Wire2 to insert them under Net1.
Warning:
It is not possible to select a wire/cable that is already associated with another net.
To remove a link, click the wire.
De-activate Net/Wire Links .
Tip:
You can de-activate Net/Wire Links by clicking anywhere in the 2D representation, on condition the 2D representation is active (in other terms, the tree is not active, you cannot zoom on it).
You can use a validation business rule when you associate / un-associate to or from a net / netgroup to wires / cables.