+geometrical object on which the group will be created). </li>
+<li> <b>Main Shape Selection restriction</b> button group allows limiting the range
+of available group elements,
+<ul><li> <b>No restriction</b> button enables all sub-shapes of the Main
+Shape.</li>
+<li><b>Geometrical parts of the Second Shape</b> restricts the range of accessible
+elements to the sub-shapes of the Main Shape that geometrically
+coincide with the <b>Second Shape</b>.</li>
+<li><b>Only Sub-shapes of the Second Shape</b> restricts the range of
+accessible elements to the sub-shapes of the Main Shape that
+are sub-shapes of the <b>Second Shape</b>. This is useful because
+sometimes purely geometrical coincidence is not enough and it
+is necessary to work with shapes, which actually belong both
+to the main and the second shape.</li>
+</ul>
+<li>You can selectively display the selected elements using the following buttons:</li>
+<ul>
+<li><b>Show only selected</b> - displays only the sub-shapes selected in the list box.</li>
+<li><b>Hide selected</b> - hides the sub-shapes selected in the list box.</li>
+<li><b>Show all sub-shapes</b> - displays only the sub-shapes of the Main Shape.</li>
+</ul>
+<li> You can select the elements of your group in two ways: