diff --git a/system/fluents.py b/system/fluents.py
index 1c23b51..9e2849e 100755
--- a/system/fluents.py
+++ b/system/fluents.py
@@ -81,11 +81,17 @@ class FluentApp:
         self.init_gui()
 
     def change_plot(self, plot):
-        # add current selection to new plot
+        """Sets the plot in the currently active ViewFrame. If the plot is already
+        shown in another ViewFrame it will be moved from there."""
+        # Set current selection in the plot before showing it.
         plot.selection_changed(self.project.get_selection())
         pt = self.widget_tree.get_widget('main_view')
         pt.insert_view(plot)
-        
+       
+    def change_plots(self, plots):
+        """Changes all plots.""" 
+        self['main_view'].set_all_plots(plots)
+
     def get_active_view_frame(self):
         return self['main_view'].get_active_view_frame()
 
diff --git a/system/navigator.py b/system/navigator.py
index 33064be..68e8936 100644
--- a/system/navigator.py
+++ b/system/navigator.py
@@ -39,7 +39,9 @@ class NavigatorView (gtk.TreeView):
         self.append_column(self.object_col)
 
         # send events to plots / itself
-        self.enable_model_drag_source(gtk.gdk.BUTTON1_MASK,[("GTK_TREE_MODEL_ROW",gtk.TARGET_SAME_APP,7)], gtk.gdk.ACTION_LINK | gtk.gdk.ACTION_MOVE)
+        self.enable_model_drag_source(gtk.gdk.BUTTON1_MASK,
+            [("GTK_TREE_MODEL_ROW", gtk.TARGET_SAME_APP, 7)],
+            gtk.gdk.ACTION_LINK | gtk.gdk.ACTION_MOVE)
     
         self.connect("drag-data-get",self.slot_drag_data)
 
@@ -78,10 +80,12 @@ class NavigatorView (gtk.TreeView):
         tmp = self._previous_selection
         self._previous_selection = paths
         # set timestamp on newly selected objects
-        [self.data_tree.set_value(self.data_tree.get_iter(path),6,time.time()) for path in paths if path not in tmp]
+        [self.data_tree.set_value(self.data_tree.get_iter(path), 6, time.time()) 
+            for path in paths if path not in tmp]
 
         objs = [self.data_tree.get_iter(path) for path in paths]
-        objs = [(self.data_tree.get_value(iter,6), self.data_tree.get_value(iter,2)) for iter in objs]
+        objs = [(self.data_tree.get_value(iter,6), self.data_tree.get_value(iter,2)) 
+            for iter in objs]
         objs.sort()
         objs = [obj for timestamp, obj in objs]
         # order dataset
@@ -132,6 +136,15 @@ class NavigatorView (gtk.TreeView):
             self.app.change_plot(obj)
         elif isinstance(obj, dataset.Dataset):
             self.display_data_info(obj)
+        elif obj == None:
+            children = []
+            i = self.data_tree.iter_children(tree_iter)
+            while i:
+                child = self.data_tree.get(i, 2)[0]
+                if isinstance(child, plots.Plot):
+                    children.append(child)
+                i = self.data_tree.iter_next(i)
+            self.app.change_plots(children)
         else:
             t = type(obj)
             logger.log('debug', 'Activated datatype was %s. Don\'t know what to do.' % t)
diff --git a/system/plots.py b/system/plots.py
index cb66c58..1f13e73 100644
--- a/system/plots.py
+++ b/system/plots.py
@@ -214,7 +214,14 @@ class MainView (gtk.Notebook):
         else:
             vf = self._large_view
         vf.set_view(view)
-        
+       
+    def set_all_plots(self, plots):
+        for vf in self._view_frames:
+            if plots:
+                vf.set_view(plots.pop())
+            else:
+                vf.set_view(None)
+
     def show(self):
         for vf in self._view_frames:
             vf.show()