diff --git a/src/dialogs_help.py b/src/dialogs_help.py
index 0fb2224..f1c0a85 100644
--- a/src/dialogs_help.py
+++ b/src/dialogs_help.py
@@ -65,6 +65,13 @@ def __populate_versions(self, control):
             imageType = 'PIL'
             imageVer = Image.VERSION
 
+
+        try:
+            import visvis as vv
+            visvisVer = vv.__version__
+        except ImportError:
+            visvisVer = 'Not installed'
+
         versions = ('Hardware:\n'
                     '\tProcessor: {}, {} cores\n\n'
                     'Software:\n'
@@ -74,6 +81,7 @@ def __populate_versions(self, control):
                     '\tNumPy: {}\n'
                     '\t{}: {}\n'
                     '\tpySerial: {}\n'
+                    '\tvisvis: {}\n'
                     '\twxPython: {}\n'
                     ).format(platform.processor(), multiprocessing.cpu_count(),
                              platform.platform(), platform.machine(),
@@ -82,6 +90,7 @@ def __populate_versions(self, control):
                              numpy.version.version,
                              imageType, imageVer,
                              serial.VERSION,
+                             visvisVer,
                              wx.version())
 
         control.SetValue(versions)
diff --git a/src/panels.py b/src/panels.py
index 18ed1e0..fbf7928 100644
--- a/src/panels.py
+++ b/src/panels.py
@@ -143,6 +143,8 @@ def __on_press(self, event):
         if self.settings.clickTune and matplotlib.__version__ >= '1.2' and event.dblclick:
             frequency = int(event.xdata * 1e6)
             self.remoteControl.tune(frequency)
+        elif isinstance(self.plot, PlotterPreview):
+            self.plot.to_front()
 
     def __on_enter(self, _event):
         self.toolTip.Enable(False)
diff --git a/src/plot_preview.py b/src/plot_preview.py
index 615f105..330f42b 100644
--- a/src/plot_preview.py
+++ b/src/plot_preview.py
@@ -30,14 +30,15 @@
     from visvis.core.line import Line
     app = vv.use('wx')
     vvPresent = True
-except ImportError as error:
+except ImportError:
     vvPresent = False
 
 
 class PlotterPreview(object):
-    def __init__(self, notify, figure, _settings):
+    def __init__(self, notify, figure, settings):
         self.notify = notify
         self.figure = figure
+        self.settings = settings
         self.axes = None
         self.window = None
         self.preview = None
@@ -49,13 +50,16 @@ def __init__(self, notify, figure, _settings):
     def __setup_plot(self):
         self.axes = self.figure.add_subplot(111)
         self.axes.set_axis_off()
-        if not vvPresent:
+        if vvPresent:
+            self.axes.text(0.5, 0.5, 'Click for preview',
+                           ha='center', va='center')
+        else:
             self.axes.text(0.5, 0.5, '"visvis" is not installed',
                            ha='center', va='center')
 
     def __setup_window(self):
         if vvPresent:
-            self.preview = DialogPreview(self.window)
+            self.preview = DialogPreview(self.window, self.settings)
             self.preview.Show()
 
     def draw_measure(self, _measure, _show):
@@ -97,6 +101,10 @@ def clear_plots(self):
     def set_grid(self, _on):
         pass
 
+    def to_front(self):
+        if self.preview is not None:
+            self.preview.to_front()
+
     def close(self):
         if self.preview is not None:
             self.preview.Destroy()
@@ -105,7 +113,9 @@ def close(self):
 
 
 class DialogPreview(wx.Dialog):
-    def __init__(self, parent):
+    def __init__(self, parent, settings):
+        self.settings = settings
+
         wx.Dialog.__init__(self, parent=parent, title="Preview",
                            style=wx.RESIZE_BORDER | wx.CAPTION |
                            wx.MAXIMIZE_BOX | wx.MINIMIZE_BOX | wx.SYSTEM_MENU)
@@ -114,7 +124,6 @@ def __init__(self, parent):
         Figure = app.GetFigureClass()
         fig = Figure(self)
         fig.bgcolor = (1, 1, 1)
-        self.__setup_plot()
 
         sizer = wx.BoxSizer()
         sizer.Add(fig._widget, 1, wx.EXPAND | wx.ALL, border=5)
@@ -123,11 +132,17 @@ def __init__(self, parent):
         self.SetAutoLayout(True)
         self.Layout()
 
+        self.__setup_plot()
+
+    def __restore_style(self, style):
+        self.SetWindowStyle(style)
+
     def __setup_plot(self):
         axes = vv.gca()
         axes.axis.showGrid = True
         axes.axis.xLabel = 'Frequency (MHz)'
         axes.axis.yLabel = 'Level (dB)'
+        axes.camera = 2
 
     def clear_plots(self):
         for wobject in vv.gca().wobjects:
@@ -139,10 +154,22 @@ def set_plot(self, spectrum):
 
         total = len(spectrum)
         count = 0.
+        alpha = 1
         for _time, sweep in spectrum.items():
-            alpha = (total - count) / total
+            if self.settings.fadeScans:
+                alpha = (total - count) / total
             vv.plot(sweep.keys(), sweep.values(), lw=1, alpha=alpha)
             count += 1
 
     def set_title(self, title):
         vv.title(title.replace('\n', ' '))
+
+    def to_front(self):
+        style = self.GetWindowStyle()
+        self.SetWindowStyle(style | wx.STAY_ON_TOP)
+        wx.CallAfter(self.__restore_style, style)
+
+
+if __name__ == '__main__':
+    print 'Please run rtlsdr_scan.py'
+    exit(1)
diff --git a/src/rtlsdr_scan.py b/src/rtlsdr_scan.py
index 5e8b500..d635136 100755
--- a/src/rtlsdr_scan.py
+++ b/src/rtlsdr_scan.py
@@ -44,7 +44,7 @@
 try:
     import visvis as vv
     vv.use('wx')
-except ImportError as error:
+except ImportError:
     pass
 
 import argparse
diff --git a/src/toolbars.py b/src/toolbars.py
index c2e1357..673f14f 100644
--- a/src/toolbars.py
+++ b/src/toolbars.py
@@ -564,6 +564,11 @@ def set_type(self, display):
         elif display == Display.TIMELINE:
             self.__add_auto_range(False, True, True)
 
+        elif display == Display.PREVIEW:
+            self.__add_check_tool('fade', 'Fade plots',
+                                  self.__on_check_fade,
+                                  self.settings.fadeScans)
+
         self.__set_func()
 
         self.Realize()
diff --git a/src/version-timestamp b/src/version-timestamp
index 517c2b4..380f809 100644
--- a/src/version-timestamp
+++ b/src/version-timestamp
@@ -1 +1 @@
-1411061386
\ No newline at end of file
+1411076796
\ No newline at end of file