diff --git a/ChangeLog b/ChangeLog
index 56c046ba..ae8cb73c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -21269,3 +21269,5 @@
 	* Added a 'RDMarkerDialog' class.
 2021-03-12 Fred Gleason <fredg@paravelsystems.com>
 	* Added a 'RDMarkerReadout' class.
+2021-03-15 Fred Gleason <fredg@paravelsystems.com>
+	* Implemented saving marker positions in 'RDMarkerDialog'.
diff --git a/lib/rdmarkerdialog.cpp b/lib/rdmarkerdialog.cpp
index 674d0b00..9f079b64 100644
--- a/lib/rdmarkerdialog.cpp
+++ b/lib/rdmarkerdialog.cpp
@@ -297,14 +297,16 @@ void RDMarkerDialog::cancelData()
       break;
 
     default:
-      break;
+      return;
     }
   }
+  done(false);
 }
 
 
 void RDMarkerDialog::closeEvent(QCloseEvent *e)
 {
+  e->ignore();
   cancelData();
 }
 
diff --git a/lib/rdmarkerview.cpp b/lib/rdmarkerview.cpp
index efa6a5a3..85c41250 100644
--- a/lib/rdmarkerview.cpp
+++ b/lib/rdmarkerview.cpp
@@ -36,7 +36,7 @@ RDMarkerHandle::RDMarkerHandle(RDMarkerHandle::PointerRole role,
 {
   setFlags(QGraphicsItem::ItemIsMovable);
   d_marker_view=mkrview;
-  d_minimum=-1;
+  d_minimum=0;
   d_maximum=-1;
 
   QPolygonF triangle;
@@ -123,19 +123,35 @@ void RDMarkerHandle::mouseMoveEvent(QGraphicsSceneMouseEvent *e)
 {
   RDMarkerView *view=static_cast<RDMarkerView *>(d_marker_view);
 
+  //
+  // Check Limits
+  //
+  int corr=0;
+  int x=pos().x()-LEFT_MARGIN;
+  if(x<d_minimum) {
+    corr=d_minimum-x;
+  }
+
   //
   // Update the Marker Graphics
   //
+  int dx=e->pos().x()-e->lastPos().x()+corr;
+  for(int i=0;i<d_peers.size();i++) {
+    QGraphicsItem *peer=d_peers.at(i);
+    peer->setPos(peer->pos().x()+dx,peer->pos().y());
+  }
+  /*
   qreal dx=e->pos().rx()-e->lastPos().rx();
   for(int i=0;i<d_peers.size();i++) {
     QGraphicsItem *peer=d_peers.at(i);
     peer->setPos(peer->pos().rx()+dx,peer->pos().ry());
   }
-
+  */
   //
   // Send Position
   //
-  view->updatePosition(d_role,pos().x()-LEFT_MARGIN);
+  view->updatePosition(d_role,x-corr);
+  //  view->updatePosition(d_role,pos().x()-LEFT_MARGIN);
 }
 
 
@@ -146,7 +162,7 @@ void RDMarkerHandle::mouseReleaseEvent(QGraphicsSceneMouseEvent *e)
   //
   // Send Position
   //
-  view->updatePosition(d_role,pos().x()-LEFT_MARGIN);
+  //  view->updatePosition(d_role,pos().x()-LEFT_MARGIN);
 }
 
 
@@ -363,6 +379,8 @@ void RDMarkerView::updatePosition(RDMarkerHandle::PointerRole role, int offset)
   d_pointers[role]=(int)((int64_t)1000*pframes/(int64_t)d_sample_rate);
   d_has_unsaved_changes=true;
 
+  updateInterlocks();
+
   emit pointerValueChanged(role,d_pointers[role]);
 }
 
@@ -410,6 +428,8 @@ bool RDMarkerView::setCut(QString *err_msg,unsigned cartnum,int cutnum)
   d_shrink_factor=d_max_shrink_factor;
   WriteWave();
 
+  updateInterlocks();
+
   return true;
 }
 
@@ -447,6 +467,21 @@ void RDMarkerView::clear()
 }
 
 
+void RDMarkerView::updateInterlocks()
+{
+  for(int i=0;i<2;i++) {
+    d_handles[RDMarkerHandle::CutStart][i]->setMinimum(0);
+    d_handles[RDMarkerHandle::CutStart][i]->
+      setMaximum(d_handles[RDMarkerHandle::CutEnd][i]->pos().x()-LEFT_MARGIN);
+
+    d_handles[RDMarkerHandle::CutEnd][i]->
+      setMinimum(d_handles[RDMarkerHandle::CutStart][i]->pos().x()-LEFT_MARGIN);
+    //    d_handles[RDMarkerHandle::CutStart][i]->
+    //      setMaximum();
+  }
+}
+
+
 void RDMarkerView::resizeEvent(QResizeEvent *e)
 {
   d_view->setGeometry(0,0,size().width(),size().height());
@@ -534,9 +569,11 @@ void RDMarkerView::DrawMarker(RDMarkerHandle::PointerType type,
     m_item=new RDMarkerHandle(role,type,this);
     d_scene->addItem(m_item);
     m_item->setPos(LEFT_MARGIN+Frame(d_pointers[role]),handle_pos-12);
+    d_handles[role][0]=m_item;
 
     m_item=new RDMarkerHandle(role,type,this);
     d_scene->addItem(m_item);
     m_item->setPos(LEFT_MARGIN+Frame(d_pointers[role]),d_height-handle_pos-8);
+    d_handles[role][1]=m_item;
   }
 }
diff --git a/lib/rdmarkerview.h b/lib/rdmarkerview.h
index d56e4053..6d673ea5 100644
--- a/lib/rdmarkerview.h
+++ b/lib/rdmarkerview.h
@@ -93,6 +93,7 @@ class RDMarkerView : public QWidget
   void pointerValueChanged(RDMarkerHandle::PointerRole role,int msec);
 
  protected:
+  virtual void updateInterlocks();
   void resizeEvent(QResizeEvent *e);
 
  private:
@@ -117,6 +118,7 @@ class RDMarkerView : public QWidget
   RDWaveFactory *d_wave_factory;
   bool d_has_unsaved_changes;
   int d_pointers[RDMarkerHandle::LastRole];
+  RDMarkerHandle *d_handles[RDMarkerHandle::LastRole][2];
 };