| F1 | Online User's Guide | 
   | Ctrl+F1 | About WSJT-X | 
-  | F2 | Open configuration window | 
+  | F2 | Open settings window | 
   | F3 | Display keyboard shortcuts | 
-  | F4 | Clear DX Call, DX Grid, Tx messages 1-5 | 
+  | F4 | Clear DX Call, DX Grid, Tx messages 1-4 | 
   | Alt+F4 | Exit program | 
   | F5 | Display special mouse commands | 
   | F6 | Open next file in directory | 
diff --git a/widegraph.cpp b/widegraph.cpp
index d6295a84c..d182aeeb3 100644
--- a/widegraph.cpp
+++ b/widegraph.cpp
@@ -360,7 +360,7 @@ void WideGraph::setRxBand (QString const& band)
   else
     {
       ui->fSplitSpinBox->setValue (m_fMinPerBand.value (band, 2500).toUInt ());
-      ui->fSplitSpinBox->setEnabled (true);
+      ui->fSplitSpinBox->setEnabled (m_mode=="JT9+JT65");
     }
   ui->widePlot->setRxBand(band);
   setRxRange ();