Index: trunk/BNC/src/bncwindow.cpp
===================================================================
--- trunk/BNC/src/bncwindow.cpp	(revision 7295)
+++ trunk/BNC/src/bncwindow.cpp	(revision 7296)
@@ -1322,5 +1322,7 @@
   _ephV3filenameCheckBox->setWhatsThis(tr("<p>Tick 'Version 3 filenames' to let BNC create so-called extended filenames following the RINEX Version 3 standard.</p><p>Default is an empty check box, meaning to create filenames following the RINEX Version 2 standard although the file contents is saved in RINEX Version 3 format.</p>"));
   _rnxV3CheckBox->setWhatsThis(tr("The default format for RINEX Observation files is RINEX Version 2. Select 'Version 3' if you want to save the observations in RINEX Version 3 format."));
-  _rnxV2Priority->setWhatsThis(tr("<p>Specify a priority list of characters defining signal attributes as defined in RINEX Version 3. Priorities will be used to map observations with RINEX Version 3 attributes from incoming streams to Version 2. The underscore character '_' stands for undefined attributes. A question mark '?' can be used as wildcard which represents any one character.</p><p>Default is priority list 'CWPX_?'.</p>"));
+
+  _rnxV2Priority->setWhatsThis(tr("<p>Specify a priority list of characters defining signal attributes as defined in RINEX Version 3. Priorities will be used to map observations with RINEX Version 3 attributes from incoming streams to Version 2. The underscore character '_' stands for undefined attributes. A question mark '?' can be used as wildcard which represents any one character.</p><p>Signal priorities can be specified as equal for all systems or system specifics. The following are example priority strings:</li><ul><li>'CWPX_?' (Same signal priorities valid for all systems)</li><li>'G:CWPX_? R:PCX_? E:CPX_?' (Specific signal priorities for GPS, GLONASS and Galileo system)</li></ul>Default is priority list 'CWPX_?'.</p>"));
+
   _miscMountLineEdit->setWhatsThis(tr("<p>Specify a mountpoint to apply any of the options shown below. Enter 'ALL' if you want to apply these options to all configured streams.</p><p>An empty option field (default) means that you don't want BNC to apply any of these options.</p>"));
   _miscPortLineEdit->setWhatsThis(tr("BNC can output an incoming stream through a TCP/IP port of your local host. Specify a port number here to activate this function."));