5.21.3.1 Delete.
To remove all connections from one or more instances on the Canvas, select the instances on the Canvas, right-click and choose Clear all Connections. This disconnects all connections that can be disconnected legally.
You can also select one or more rows in the Grid and choose Remove Connections from Selected Ports from the right-click menu to remove the connects for a group of Ports.
If you click in a cell displaying a connection, selecting Disconnect from the drop down removes just that connection. Certain connections to ports with PAD properties cannot be disconnected. PAD ports must be connected to a design’s top level port. PAD ports will eventually be assigned to a package pin. In SmartDesign, these ports are automatically promoted to the top level and cannot be modified or disconnected.
