Doc: using locator to open a file to the specified line

Change-Id: Ic732bd32ccc16fe507b42db211e7d34ddb85b3dd
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

doc/src/editors/creator-editors.qdoc

@@ -1806,8 +1806,14 @@
 
             The main.cpp file opens in the editor.
 
+        \o  To move to a line in the file, enter the line number in the locator.
+
     \endlist
 
+    To move directly to a particular line in the document when you open the
+    document, append a plus sign (+) or a colon (:) to the file name in the
+    locator. For example, to open main.cpp to line 41, enter: \c {main.cpp:41}.
+
     If the path to a file is very long, it might not fit into the locator
     window. To view the full path, press \key Alt when the filename is selected.