-\n Checks the topology of the selected geometrical object and returns
-True if it is valid. Check also geometry checkbox allows to test the
-geometry as well.
+\n This operation checks the topology of the selected geometrical object and returns
+True if it is valid.
+
+\image html measures9.png
+
+In this dialog:
+
+- \b Object - the checked object. \b Selection button allows picking it in the viewer or in the object browser.
+- <b>Check also geometry</b> option allows testing the geometry of the object as well.
+- \b Errors list informs of possible errors.
+- <b>Incriminated Sub-shapes</b> field outputs the list of sub-shapes that cause problem. It is possible to select them in the list and publish in the study for further analysis by clicking \b Apply or <b>Apply and Close</b> button.