The Contained Interface (

) is actually a link node, similar to the
Feature Link and
Property Link nodes. The difference is that you do not choose an item from the
Building Blocks branch but among the available physics interfaces.
Right-click the Multiphysics Interface node to add this feature from the context menu.
The Settings window has the following sections:
In the Links from list choose where to look for a certain interface:
From the Add default features from interface list, choose
Default features except those below to add the same default features as the contained interface. Choose
Customized to select the default features manually using the buttons under the list. The list can be empty if you do not want to use any default features from this interface.
In the Remove features list, add features from the contained interface that you do not want in the multiphysics interface. Make sure that you do not remove a feature that you use as a default feature.