--- /dev/null
+
+/**
+ @file
+ \brief Help for the update object
+*/
+
+/**
+ \page update Update object(s)
+
+Note that objects update is not automatic in The HYDRO GUI project.
+
+For example, in the case when one of profiles used in Stream is changed, the Stream is marked as not updated in object browser.
+
+\image html not_updated_stream.png "Not updated stream in object browser"
+
+
+The user starts the Update operation via context menu of <b>NATURAL OBJECTS/Stream_1 </b> in Object browser => <b>Update</b>.
+
+The Stream object is updated. If the <b>Stream_1_bottom</b> polyline exists, it is also updated together with parent stream.
+
+
+\image html updated_stream.png "Updated stream in object browser"
+
+
+ <a href="index.html"><b>Back to Main page.</b></a>
+
+*/
