wxGUI/modeler: manual updated

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@41810 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/docs/wxGUI.Modeler.html

@@ -4,7 +4,20 @@
 
 <p>
 <b>Graphical modeler</b> is a <em><a href="wxGUI.html">wxGUI</a></em>
-extension which allows the user to create, edit, and manage models.
+extension which allows the user to create, edit, and manage
+models. It's available from the menu &quot;File | Graphical modeler&quot;.
+
+<p>
+The modeler currently allows to:
+
+<ul>
+  <li>define actions (GRASS modules)
+  <li>define data items (raster, vector, 3D raster)
+  <li>define relations between data and action items
+  <li>validate model
+  <li>run model
+  <li>store model settings to the file (GRASS Model File|*.gxm)
+</ul>
 
 <h2>AUTHORS</h2>