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+\note All dialogs intended for adding quadratic elements to mesh provide a possibility
+to add these elements to the specified group (or to create the group if it doesn't exist).
+<b>Add to group</b> box allows to choose an existing group for created element or
+to specify a name for new group.
+
To create any <b>Quadratic Element</b> specify the nodes which will form your
triangle by selecting them in the 3D viewer with pressed Shift
button. Their numbers will appear in the dialog box as <b>Corner Nodes</b>
