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From the Transform section of the action bar, click Extract
 .
- In the Elements(s) to extract box, select an edge or the face of an element.
- In the Propagation type list, select any one of the below options:
- Point continuity: The extracted element has no hole.
- Tangent continuity: The extracted element is created according to tangency conditions.
- Curvature continuity: The extracted element (necessarily a curve) is created according to curvature conditions.
- Depression/Protrusion propagation: You can quickly select protrusions and/or depressions of a surface. Also, the base surface can be selected without its protrusions and/or depressions. Two cells belong to a protrusion if their union is convex. Two cells belong to a depression if their union is concave.
- No propagation: Only the selected element is created.
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Select a Recognition context for the
Depression/Protrusion propagation types.
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Select the Federation check box to generate groups of
elements belonging to the resulting extracted element that is detected together
with the pointer when selecting one of its subelements.
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Click OK.
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