A physics interface can have an Auxiliary Settings node () that contains a collection of settings for its physics interface that you usually do not need to change.

To add an Auxiliary Settings node, right-click the Physics Interface or Multiphysics Interface nodes and select it from the context menu. Also right-click the Auxiliary Settings node to add a Disable Allowed Study Types node.

The Settings window includes the following sections:

This section contains a table with the four columns: Property name, Input name, Default value, and Read only and hidden. The purpose of this table is to specify default values for the user inputs in properties of the physics interface. Of course the user inputs already have default values specified in their own features. So this functionality is a way to redefine those default values. A situation where this is useful is when two physics interfaces make use of the same property through a Property Link node. Then this setting makes it possible to have different default values of the user inputs defined under the property for the two physics interfaces.

Click to select either of the Not applicable on infinite element domain, Not applicable on perfectly matched layer domain, Not applicable on absorbing layer domain (selected by default), Not applicable on moving domains, and Use default settings for layered material selection check boxes to make sure that the physics interface cannot be applied on a domain of the particular type. To access these settings, first select the Specify special applicability for selection check box. When cleared, the settings included with this check box are ignored and grayed out. This is important if an interface or feature uses multiple auxiliary settings for some reason. It is then important that these settings are either identical or ignored; otherwise, an error will be thrown. The Specify special applicability for selection check box is selected by default.

From the Domain filtering list, choose No filtering (the default) or Include entity type. Select the Include entity type option to show a list of entity types, where the default is Geometry (equivalent to the No filtering option). For interfaces that exist on domains, you can only add void entity types (Voids, Infinite void, and Finite voids). Doing this will enable an interface for void domains. For interfaces on lower dimension (boundaries, for example), more entity types are available. Selecting Exterior and Interior, for example, makes the symmetry axis not applicable for the physics interface and its features.

In this section it is possible to select what standard features to remove from the context menu of the physics interface. Possible standard features are the following, which you can add by clicking the Add button () and selecting them from the dialog box that opens:

Select the Only hide features from context menus check box to only remove them from the user interface’s context menu but make it possible to open existing MPH-files that include any of the removed features.