geometrical model in the 3D Viewer, which can help to understand the
location of a set of edges within the model.
-<b>Propagation chains</b> group allows splitting opposite edges of quadrilateral faces
+<b>Propagation chains</b> group allows defining <b>Reversed Edges</b>
+for splitting opposite edges of quadrilateral faces
in a logically uniform direction. When this group is
activated, the list is filled with propagation chains found within the
model. When a chain is selected in the list its edges are
