Extract
Use the Extract () node to extract entities from geometry objects into new objects. You can, for example, extract a face from a 3D solid object into a new surface object. You can also extract selected geometry objects, which keeps only those objects and deletes all other objects.
Add an Extract () node to a geometry sequence from the Geometry toolbar, or right-click the Geometry node and add it from the context menu. Then enter the properties of the extract operation using the following sections:
Entities or Objects to Extract
From the Geometric entity level list, choose the level of the entities to extract: Object, Domain, Boundary (that is, faces in 3D and edges in 2D), Edge (3D only), or Point. Then select the objects or entities that you want to extract in the Graphics window or use the Selection List window. The objects or entities appear in the Selection list when you have confirmed (locked) the selection in the Graphics window. If the geometry sequence includes user-defined selections above the Extract node, choose Manual to select objects or entities, or choose one of the selection nodes from the list next to Selection.
Click the Active button to toggle between turning ON and OFF the Selection list.
When you are extracting entities, that is when Geometry entity level is set to Domain, Boundary, Edge, or Point, from the Input object handling list, select one of the following options:
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 Keep (the default), to keep the unmodified input objects after extracting the selected entities.
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Create remainder object, to delete the extracted entities from the input objects. The following applies:
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Deleting a boundary merges its adjacent domains and/or voids. For example, when deleting a boundary from a solid block, the result is a surface object with five boundaries.
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Deleting an edge in 3D or vertex in 3D or 2D from a solid or surface object only works if the edge or vertex is isolated in a domain or in a face. For example, the edges or vertices of a solid block can not be deleted, since they are needed by the faces, so the object is unchanged by the delete operation.
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 Remove, to delete the input objects after extracting the selected entities.
Selections of Resulting Entities
Select the Resulting objects selection check box to create predefined selections (for all levels — objects, domains, boundaries, edges, and points — that are applicable) in subsequent nodes in the geometry sequence. To also make all or one of the types of resulting entities (domains, boundaries, edges, and points) that the resulting objects consist of available as selections in all applicable selection lists (in physics and materials settings, for example), choose an option from the Show in physics (Show in instances if in a geometry part; Show in 3D in a plane geometry under a work plane in a 3D component) list: All levels, Domain selection, Boundary selection, or Point selection. The default is Domain selection, which is suitable for use with materials and physics defined in domains. For use with a boundary condition, for example, choose Boundary selection. These selections do not appear as separate selection nodes in the model tree. Select Off to not make any selection available outside of the geometry sequence. From the Color list, choose a color for highlighting the resulting objects selection. See Selection Colors.
Cumulative Selection
If you want to make the resulting entities contribute to a cumulative selection, select a cumulative selection from the Contribute to list (the default, None, gives no contribution), or click the New button to create a new cumulative selection (see Cumulative Selections).
Assigned Attributes
From the Construction geometry list choose On to make the resulting objects available only in the feature’s geometry sequence. The default option Inherit means that the resulting objects become construction geometry if all input objects are construction geometry. Choose Off to never output construction geometry objects. For more information see Construction Geometry.