13.17.7 Connect to an Existing Net (Net-Instance View)

To connect to an existing net, select the ports to be connected from the drop-down list by clicking in the cell at the intersection of the net and the instance (see figure below).

Any net can have at most one driver. IN ports of the top-level or OUT ports from instances are considered drivers. If another driver is for an already driven net, the current driver will be disconnected and the new driver will be connected to the selected net.