Index: trunk/BNC/src/PPP/pppWidgets.cpp
===================================================================
--- trunk/BNC/src/PPP/pppWidgets.cpp	(revision 5894)
+++ trunk/BNC/src/PPP/pppWidgets.cpp	(revision 5895)
@@ -120,4 +120,11 @@
   _mapSpeedSlider->setTickInterval(10);
   
+  _mapWinButton->setWhatsThis(tr("<p>You make like to track your rover position using Google Maps or Open Street Map as a background map. Track plots can be produced with BNC in 'Realtime-PPP', 'Realtime-SPP' and 'Post-Processing' mode.</p><p>The 'Open Map' button opens a windows showing a map according to specified options.</p><p>When in 'Post-Processing' mode you should not forget to specify a proxy under the 'Network' tab if that is operated in front of BNC."));
+  _gmRadioButton->setWhatsThis(tr("<p>Specify Google Maps as the background for your rover positions."));
+  _osmRadioButton->setWhatsThis(tr("<p>Specify Open Street Map as the background for your rover positions."));
+  _mapWinDotSizeLineEdit->setWhatsThis(tr("<p>Specify the size of dots showing the rover positions.</p><p>A dot size of '3' may be appropriate. The maximum possible dot size is '10'. An empty option field or a size of '0' would mean that you don't want BNC to show the rover's track on the map.</p>"));
+  _mapWinDotColorComboBox->setWhatsThis(tr("<p>Specify the color of dots showing the rover track.</p>"));
+  _mapSpeedSlider->setWhatsThis(tr("<p>With BNC in PPP post-processing mode you can specify the speed of computations as appropriate for visualization. Note that you can adjust 'Speed' on-the-fly while BNC is already processing your observations."));
+
   readOptions();
 }