\n <center><b>Scaling</b> - represents objects deformed (stretched or
stuffed) along the axes of coordinates.</center>
+<b>Note!</b> OCC Viewer features a special <b>Polyline Selection</b> mechanism, which allows selecting an arbitraty part of the graphic area using a polygon frame, instead of the usual selection with a rectangular frame.
+
+To produce a Polyline Selection, lock the right mouse button and draw the first side of the polygon, then change the direction by clicking the left mouse button add draw another side, etc. The whole selection frame is drawn with the locked right mouse button.
+
+\image html polyselection1.png
+
+As a result, only the nodes within the frame are selected.
+
+\image html polyselection2.png
+
*/
