+This operation allows to create a new group in such a way that all
+sub-shapes that are present in the initial groups will be added to
+the new one.
+
+<em>To union groups:</em>
+<ol>
+<li>In the <b>New Entity</b> menu select the \b Group - <b>Union Groups</b> item.
+The following dialog box will appear:
+
+\image html groups_union_dlg.png
+
+In this dialog box you should specify the name of the resulting group
+and select the groups, which will be united.
+</li>
+<li>Click the \b Apply or <b>Apply and Close</b> button to confirm creation of the group.</li>
+</ol>
+
+<b>See Also</b> a sample TUI Script of a
+\ref tui_union_groups_anchor "Union of Groups" operation.
+
+<br>
+\anchor intersect_groups_anchor
+<h2>Intersection of groups</h2>
+
+This operation allows to create a new group in such a way that only
+the sub-shapes that are present in all initial groups are added to the
+new one.
+
+<em>To intersect groups:</em>
+<ol>
+<li>In the <b>New Entity</b> menu select the \b Group - <b>Intersect Groups</b> item.
+The following dialog box will appear:
+
+\image html groups_intersect_dlg.png
+
+In this dialog box you should specify the name of the resulting group
+and select the groups, which will be intersected.
+</li>
+<li>Click the \b Apply or <b>Apply and Close</b> button to confirm creation of the group.</li>
+</ol>
+
+<b>See Also</b> a sample TUI Script of an
+\ref tui_intersect_groups_anchor "Intersection of Groups" operation.
+
+<br>
+\anchor cut_groups_anchor
+<h2>Cut of groups</h2>
+
+This operation allows to create a new group in such a way that all
+sub-shapes that are present in the main groups but are absent in the
+tool groups are added to the new one.
+
+<em>To cut groups:</em>
+<ol>
+<li>In the <b>New Entity</b> menu select the \b Group - <b>Cut Groups</b> item.
+The following dialog box will appear:
+
+\image html groups_cut_dlg.png
+
+In this dialog box you should specify the name of the resulting group
+and the groups which will be cut.
+</li>
+<li>Click the \b Apply or <b>Apply and Close</b> button to confirm creation of the group.</li>
+</ol>