Extrude
To extrude planar objects into 3D objects, in the Geometry toolbar, click Extrude (). You can also right-click the Geometry or a Work Plane feature to add this from the context menu. Then enter the properties of the extrude operation.
General
From the Extrude from list, select Faces to extrude planar faces from the 3D geometry. Select the faces that you want to extrude in the Graphics window. They appear in the Input faces list. All selected faces must lie in the same plane. Alternatively, from the Extrude from list, select Work plane to extrude objects from a work plane. In the Work plane list, select the work plane to extrude from. Select the objects that you want to extrude in the Graphics window. They appear in the Input objects list.
From the Input object handling list, select one of the following options:
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 Unite with (the default), to unite the input objects with the extruded objects.
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 Keep, to keep the extruded objects separate from the input objects.
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 Remove, to avoid that the input faces appear in the Form Union operation. This option is useful if you extrude in both directions and have cleared the Include input faces check box in the Distances section below.
Click the Active button to toggle between turning ON and OFF the Input objects selections.
Distances
From the Specify list, choose Distances from plane (the default) or Vertices to extrude to.
For Distances from plane, specify one or several distances (positive or negative) in the table. These determine the height above or below the work plane or planar faces for the top of each layer. The Reverse direction check box reverses the direction of the extrusion. To achieve a symmetric extrusion for a total thickness th, enter two distances: th/2 and −th/2.
For Vertices to extrude to, select vertices to extrude the planar objects to from the list or by selecting them in the Graphics window.
Select the Include input faces check box (selected by default) to also include a face of the extruded objects at their input location (the work plane). If you clear this check box, you do not get a face at the work plane, so the number of distances from the plane must be at least 2. Likewise, if you extrude to a single vertex, you need to include the input faces as a second end face for the extruded objects.
If you extrude several layers, remove the interior boundaries by clearing the Keep cross-sectional faces check box.
The direction arrow that appears in the Graphics window indicates the length of each extrusion distance.
Scales
For each layer, specify a length scaling factor for the top of the layer relative to the work plane object or planar faces.
Displacements
For each layer, specify a displacement vector for the top of the layer in the work plane’s coordinate system, or the local coordinate system defined by the first face to extrude. The first face is the face with smallest face number in the geometry object that comes first in the geometry sequence.
Twist Angles
For each layer, specify a rotation angle for the top of the layer around the work plane’s normal vector or the normal vector of the first face to extrude. The first face is the face with smallest face number in the geometry object that comes first in the geometry sequence.
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) list: All levels, Domain selection, Boundary selection, Edge 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).
Selections on Input Objects
If you have Named Selections that include entities on the input objects, select the Propagate selections to resulting objects (selected by default) check box to update the selections to corresponding entities on the output objects, when possible. Clear the check box to not propagate the selection to the resulting objects. This can be useful in combination with selecting the Keep from the Input object handling list so that the selections refer only to the input objects.
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.