The Adjacent Selection () node selects all entities of a given dimension that are adjacent to entities in a given set of selections (having another dimension). For example, it can select all boundaries adjacent to a given domain selection. To add this node, right-click the Geometry node and choose Selections>Adjacent Selection.

See Adjacent for the Input Entities and Output Entities settings, which are the same.

By default, the Keep selection check box is selected. Clear the check box if you do not want the resulting selection to be available as a named selection in other nodes in the geometry sequence or other parts of the model tree. If the Keep selection check box is selected, you can also determine if the selection should appear in applicable settings for physics, materials, and other parts of the model tree outside of the geometry using the Show in physics list (or Show in instances if the selection is in a geometry part; Show in 3D in a plane geometry under a work plane in a 3D component). If the geometric entity level is not set to Object (any of Domain, Boundary, Edge, or Point), choose On (the default) or Off to show the selection in physics and other settings or not. If the geometric entity level is Object, choose one of All levels (that is, all entity levels), Object selection (in geometry parts only), Domain selection, Boundary selection, Edge selection (3D only), Point selection, or Off. For Show in physics, All levels is the default; for Show in instances, Object selection is the default.

From the Contribute to list, choose an option. In addition to available Cumulative Selection nodes, None is always available from the list. To create a new Cumulative Selection, click New. Enter a Name in the New Cumulative Selection window. Click OK or press enter. This new cumulative selection is now available from any Contribute to list for a geometry selection.