-<li>if it is necessary to convert a standard mesh to quadratic or a quadratic
-mesh to standard. Note that the choice is available only if the selected mesh
-(or sub-mesh) contains both quadratic and linear elements, else the
-direction of conversion is selected automatically.</li>
-
-<li>if it is necessary to place medium nodes of the quadratic mesh on the
+<li>If it is necessary to convert a linear mesh to quadratic or a quadratic
+ mesh to linear. **Convert to bi-quadratic** option means same as
+ **Convert to quadratic** except that QUAD9 elements are created
+ instead of QUAD8, and HEXA27 elements are created instead of
+ HEXA20. Note that the choice is available only if the selected mesh
+ (or sub-mesh) contains both quadratic and linear elements, else the
+ direction of conversion is selected automatically.</li>
+<li>If it is necessary to place medium nodes of the quadratic mesh on the