+\section basic_properties_anchor Basic Properties
+
+This operation provides calculation of length, area or volume for the the selected object:
+- \b Length is calculated as a sum of lengths of all 1D elements;
+- \b Area is a sum of areas of all 2D elements
+- \b Volume is a sum of volumes of all 3D elements.
+
+To start a <b>Basic Properties</b> calculation, select <b>Length</b>, <b>Area</b> or <b>Volume</b> item.
+
+\image html basic_props.png
+
+In the dialog box select the required type of calculation (length, area or volume) and the object (mesh, sub-mesh or group) and press \b Compute button.
+
+The result of calculation will be shown in the bottom area of the dialog.
+
+\note
+- If the mesh consists of 3D elements only, its "length" and "area" will be 0.
+- As calculation result is a sum of lengths, areas and volumes of all mesh elements, the
+ duplication is not taken into account; i.e. all duplicated elements
+ (elements built on the same set of nodes) will be included into the result.
+- Similarly, intersection of elements is not taken into account.
+
+<b>See Also</b> a sample TUI Script of