possible face size.</li>
</ul>
<li><b>Drop Small Edges</b> (DropSmallEdges) - removes edges, which
-merge with neighbouring edges.</li>
+merge with neighboring edges.</li>
<ul>
<li><b>3D Tolerance</b> (DropSmallEdges.Tolerance3d) - defines minimum
possible distance between two parallel edges.</li>
</ul>
+<li><b>Drop Small Solids</b> (DropSmallSolids) - either removes small
+ solids or merges them with neighboring ones.</li>
+<ul>
+<li><b>Width factor tol.</b> (DropSmallSolids.WidthFactorThreshold) -
+ defines maximum value of <em>2V/S</em> of a solid which is
+ considered small, where \a V is volume and \a S is surface area of
+ the solid.</li>
+<li><b>Volume tol.</b> (DropSmallSolids.VolumeThreshold) - defines
+ maximum volume of a solid which is considered small.</li>
+<li><b>To merge solids</b> (DropSmallSolids.MergeSolids) - if
+ activated, small solids are removed, else small solids are merged to
+ adjacent non-small solids or left untouched if cannot be merged.
+</li>
+</ul>
+If the both tolerances are activated a solid is considered small if
+it meets the both criteria.
<li><b>Split Angle</b> (SplitAngle) - splits faces based on conical
surfaces, surfaces of revolution and cylindrical surfaces in segments
using a certain angle.</li>
