Use a Physics Area () node to categorize the physics in different physics areas. It collects the physics interfaces into more intuitive and quick access groups.

To add a Physics Area:

The Settings window has the following sections:

This section contains a tree view of all physics areas and subcategories available from built-in resources, other areas defined in the current builder file, and areas defined in any imported file under the External Resources branch. To put your new physics area under a specific category in the tree, you first select that item. Then you click the Set as parent button () below the tree. As an alternative, you can also right-click the selected item, and choose Set as parent from the submenu. You find the currently selected category under the Parent area divider. If you do not specify a parent area, the area has Root as its parent area.

Also control the position of the physics area in the list of areas it currently belongs to. Click the Move up () or Move down () buttons to move the area in the list.

In the Name field you define a unique string that identifies the physics area, which must be unique among all areas present in the Model Wizard. The text you write in the Description field is the text COMSOL Multiphysics displays for the physics area in the Model Wizard. You can also specify an icon image in the Icon field, either by typing the name or by choosing an icon from the file system. The Weight field controls the position of your physics area in the list it currently belongs to. The higher the weight (a larger number), the further down the position in the list. The Move up and Move down buttons in the Physics Area section provide another way to change the weight.