-Emphasizes by the red color all free faces of a given shape in the 3D Viewer.
-A free face is a face which is not shared between several sub-shapes of the shape.
+This operation highlights in red all free faces of the selected shape in the 3D Viewer.
+
+A free face is a face, which is not shared between several sub-shapes of the shape.
+
+\image html repair10.png