In the Design toolbar, click Connect > Net to open the Net panel.
In the Net panel, click No Connection
A cross mark attaches to the cursor for placement.
Click on the desired pin to place a mark on pins that should remain unconnected.
The No Connection mark appears on the pin.
When you have finished marking the pins, click Done to close the Net panel.
Select one or multiple pins in the Design Manager persistent panel Items table,
Right-click and choose Place No Connection mark.