-In this dialog box specify the name of the resulting group, types of entities and set of source groups.
-
-In the figure below, there are two source Volume groups:
+In this dialog box specify <ul>
+ <li> the resulting <b>Group name</b>, </li>
+ <li> the <b>Elements Type</b> of entities of the resulting group,</li>
+ <li> the criterion of inclusion of a mesh entity to the result group,
+ which is <b>Number of common nodes</b> of the entity and the
+ reference groups: <ul>
+ <li>\b All - include if all nodes are common;</li>
+ <li>\b Main - include if all corner nodes are common (meaningful for
+ a quadratic mesh) </li>
+ <li><b>At least one</b> - include if one or more nodes are common</li>
+ <li>\b Majority - include if half or more nodes are common</li></ul>
+ </li>
+ <li> select reference groups,</li>
+ <li> If <b>Include underlying entities only</b> option is activated
+ an entity can be included if it is based on nodes of
+ one element of a reference group.</li>
+</ul>
+
+In the figure below, there are two reference Volume groups: