- control face. If you pick a node in the 3D Viewer then the \b Direction
- vector will go from the coordinate system origin to the selected node.
- If you pick two nodes (holding Shift button) then the \b Direction vector
- will go from the first to the second node.</li> </ul> </li>
-<li>To reorient according to volumes: <ul>
+ control face. There are following options: <ul>
+ <li>adjust vector components directly;</li>
+ <li>select a vertex in the Object Browser or a node in the 3D
+ Viewer; their coordinates will define vector components;</li>
+ <li> pick two nodes (holding Shift button), the \b Direction vector
+ will go from the first to the second node.</li>
+ </ul>
+ </ul>
+
+<br>
+<center>
+\image html reorient_2d_point.png "The orientation of adjacent faces is chosen according to a vector. The control face is found by point."
+</center>
+
+</li>
+
+<li>In the second mode it is possible to pick the \b Face by mouse in the 3D Viewer or directly input the \b Face ID in the corresponding field.
+
+<center>
+\image html reorient_2d_face.png "The orientation of adjacent faces is chosen according to a vector. The control face is explicitly given."
+</center>
+
+</li>
+
+<li>In the third mode, the faces can be reoriented according to volumes:
+ <ul>