The fifth tab in the Preferences dialog box is Ports as pictured below. This tab determines the initial source from which the ports for the Sonnet project are taken.
Automatically update of ports from initial location: If you wish to update your Sonnet project ports whenever a change is made in the source, select this checkbox. Anytime that the Sonnet project is opened, the initial location is checked and any changes made there are updated in the Sonnet project.
Initial Location to Find Port Information: This identifies the source from which the Sonnet project obtains the initial port definitions. You may select “Layout Ports” which will translate any ports which appear in the layout view to the Sonnet project. The other source is “Momentum” ports, which uses any ports defined in the Momentum design which is being translated into Sonnet.