-<li><b>Scalar Range</b> in this menu you can specify
-<b>Min value</b> and <b>Max value</b> of the <b>Scalar Bar</b> </li>
+<li><b>Scalar Range</b> - in this menu you can specify
+<b>Min value</b> and <b>Max value</b> of the <b>Scalar Bar</b>, and
+also you can turn on/off <b>Logarithmic</b> scaling of the scalar bar.</li>
+
+\note <b>Logarithmic scale</b> is not applicable in case of
+negative and zero values in the range. In such cases it is disabled.