-<li><b>Exclude Groups</b> group box allows to ignore the nodes which
-belong to the specified mesh groups.</li>
-<li><b>Nodes to keep</b> group box allows to specify nodes to keep in
- the mesh. (By default a node being the first in a group of
- coincident nodes is kept.) It is possible to either select nodes in
- the Viewer or select groups of any element type whose nodes will be
- kept.
- <ol>
+<li><b>Exclude groups from detection</b> group allows to ignore the
+ nodes which belong to the specified mesh groups. This control is
+ active provided that the mesh includes groups.</li>
+<li><b>Nodes to keep during the merge</b> group allows to specify
+ nodes to keep in the mesh. (By default a node being the first in a
+ group of coincident nodes is kept.) It is possible to either select
+ nodes in the Viewer or select groups of any element type whose nodes
+ will be kept.
+ <ul>