diff --git a/plotter.cpp b/plotter.cpp
index 2d66572..154aa8a 100644
--- a/plotter.cpp
+++ b/plotter.cpp
@@ -566,6 +566,16 @@ void CPlotter::DrawOverlay()                   //DrawOverlay()
     painter0.drawLine(x1+1,28,x2-2,28);
   }
 
+  x1=XfromFreq(2500);
+  x2=XfromFreq(5000);
+  if(x1<=m_w and x2>0) {
+    painter0.setPen(penYellow);               //Mark top of sub-band
+    painter0.drawLine(x1+1,26,x2-2,26);
+    painter0.drawLine(x1+1,28,x2-2,28);
+  }
+
+
+
   if(m_mode=="FT8"){
       int fwidth=XfromFreq(m_rxFreq+bw)-XfromFreq(m_rxFreq);
       QPainter overPainter(&m_DialOverlayPixmap);
diff --git a/widegraph.cpp b/widegraph.cpp
index edd7222..883c9a7 100644
--- a/widegraph.cpp
+++ b/widegraph.cpp
@@ -227,7 +227,8 @@ void WideGraph::on_offsetSpinBox_valueChanged(int n){
       return;
   }
 
-  n = qMax(500, n);
+  // TODO: jsherer - here's where we'd set minimum frequency again (later?)
+  n = qMax(0, n);
 
   setRxFreq(n);
   setTxFreq(n);