-<li><b>Into N tetrahedra/prisms</b> allows to specify the number of
- tetrahedra or prisms a hexahedron will be split into. If the
- specified method does not allow to get a conform mesh, a generic
- solution is applied: an additional node is created at the gravity
- center of a hexahedron, serving an apex of tetrahedra, all
- quadrangle sides of the hexahedron are split into two triangles each
- serving a base of a new tetrahedron.</li>
-<li> <b> Facet to split </b> group allows to specify a side (facet) of a
- hexahedron to split into triangles when splitting into prisms.
- The facet to split is defined by specifying a point and a direction
- close to normal of the facet. The operation finds a hexahedron most
- close to the specified point and splits a facet whose normal is most
- close to the specified direction. Then the splitting is propagated
- from that hexahedron to all adjacent hexahedra.
- <ul>
- <li> <b> Hexa location </b> allows to specify a <em> start
- point </em> by which a first split hexahedron is found. <em>
- Selection button</em> switches to selection of the element whose
- barycenter will be used the start point and whose direction will be
- used as a normal to facet to split into triangles. To return to
- selection of volumes to split it is necessary to switch this button
- off. </li>
- <li> <b> Facet normal </b> allows to specify a direction of the
- normal to hexahedron facet to split into triangles.</li>
- </ul>
-<li><b> All domains </b> - if it is off the operation stops as all
+<li><b>Into 2 (or 4) prisms</b> allows to specify the number of prisms a hexahedron will be split into.</li>
+<li> <b> Facet to split </b> group allows to specify the side (facet) of the hexahedron, which is split into triangles. This facet is defined by a point and a direction. The algorithm finds a hexahedron closest to the specified point and splits a facet whose normal is closest to the specified direction. Then the splitting is propagated from that hexahedron to all adjacent hexahedra.
+The point and the direction by which the first split hexahedron is found can be specified:
+<ul>
+ <li> by input of coordinates in <b> Hexa location </b> and <b> Facet normal </b> fields, or </li>
+ <li> by clicking <b>Selection</b> button and selecting in the viewer the element whose barycenter will be used as the start point and whose direction will be used as a normal to facet to split into triangles. Switch this button
+off to return to selection of volumes to split.</li>
+</ul>
+
+<li> If <b> All domains </b> option is off, the operation stops when all