<li><b>Stretch factor</b> - defines the growth factor of prism height
from the mesh boundary inwards.</li>
<li><b>Faces without layers</b> - defines geometrical faces on which
-prism layers should not be constructed. By default the prism layers
-are not constructed on geometrical faces shared by solids.</li>
+ prism layers should not be constructed. By default the prism layers
+ are not constructed on geometrical faces shared by solids.
+ \note A mesh shown in the 3D Viewer can prevent selection of faces,
+ in this case just hide the mesh. To prevent a long waiting when a
+ geometry with many faces is displayed, a number of faces shown at a time
+ is limited by the value of "Sub-shapes preview chunk size" preference
+ (in Preferences/Mesh/General tab).
+</li>
</ul>
\image html viscous_layers_mesh.png A group containing viscous layer prisms.
