-Detects and highlights wires and edges that are not shared between
-two faces and are considered a shape's boundary.
+This operation detects and highlights the free boundaries of the selected object.
+
+Free boundaries are wires and edges that are not shared between two faces.
+
+\image html repair9.png
+
+The information about the number of closed and open free boundaries is also provided.
+
+Press \b Apply or <b>Apply and Close</b> button to publish the corresponding wires or edges in the study.
+
+\image html repair9a.png "Free boundary of a compound"