+The feature **Measurement** calculates dimensions of sub-elements of a geometrical object (shape).
+
+The measured dimension is displayed in the property panel and shown in 3D OCC viewer.
+
+The properties of dimension text and line, such as font, color, arrow size, etc. can be defined in the Preferences :ref:`visualization_preferences`.
+
+**Apply** button does not generate any result and has the same effect as **Cancel** for this feature.
+
+To start Measurement in the active part:
+
+#. select in the Main Menu *Part - > Measurement* item or
+#. click |measurement.icon| **Measurement** button in the toolbar
+
+The following dimensions can be calculated:
+
+ .. image:: images/meas_length_32x32.png
+ :align: left
+ edge length
+
+ .. image:: images/meas_distance_32x32.png
+ :align: left
+ distance between objects
+
+ .. image:: images/meas_radius_32x32.png
+ :align: left
+ radius
+
+ .. image:: images/meas_angle_32x32.png
+ :align: left
+ angle between edges
+
+ .. image:: images/meas_angle3p_32x32.png
+ :align: left
+ angle by 3 points
+
+Edge length
+-----------
+
+The length can be measured for straight or curved edge built on two points.