+You can specify nodes either by clicking them in the Viewer or by typing their IDs in **Tree nodes** field. If the nodes are correctly specified, upon pressing **Compute** button the angle measure will be displayed and the angle will be shown in the Viewer.
+
+.. image:: ../images/angle_measure.png
+ :align: center
+
+
+**See Also** a sample TUI Script of :ref:`tui_measurements_page`.