diff --git a/sdrbase/dsp/spectrumsettings.cpp b/sdrbase/dsp/spectrumsettings.cpp
index d114ce2fd..022cbaed7 100644
--- a/sdrbase/dsp/spectrumsettings.cpp
+++ b/sdrbase/dsp/spectrumsettings.cpp
@@ -61,6 +61,7 @@ void SpectrumSettings::resetToDefaults()
 	m_wsSpectrum = false;
     m_wsSpectrumAddress = "127.0.0.1";
     m_wsSpectrumPort = 8887;
+	m_markersDisplay = MarkersDisplayNone;
 }
 
 QByteArray SpectrumSettings::serialize() const
@@ -93,6 +94,7 @@ QByteArray SpectrumSettings::serialize() const
     s.writeBool(25, m_usb);
 	s.writeS32(26, m_fpsPeriodMs);
 	s.writeBool(27, m_wsSpectrum);
+	s.writeS32(28, (int) m_markersDisplay);
 	s.writeS32(100, m_histogramMarkers.size());
 
 	for (int i = 0; i < m_histogramMarkers.size(); i++) {
@@ -169,10 +171,12 @@ bool SpectrumSettings::deserialize(const QByteArray& data)
         d.readBool(24, &m_ssb, false);
         d.readBool(25, &m_usb, true);
 		d.readS32(26, &tmp, 50);
-		d.readBool(27, &m_wsSpectrum, false);
 		m_fpsPeriodMs = tmp < 5 ? 5 : tmp > 500 ? 500 : tmp;
-		int histogramMarkersSize;
+		d.readBool(27, &m_wsSpectrum, false);
+		d.readS32(28, &tmp, 0);
+		m_markersDisplay = (MarkersDisplay) tmp;
 
+		int histogramMarkersSize;
 		d.readS32(100, &histogramMarkersSize, 0);
 		histogramMarkersSize = histogramMarkersSize < 0 ? 0 :
 			histogramMarkersSize > SpectrumHistogramMarker::m_maxNbOfMarkers ?
diff --git a/sdrbase/dsp/spectrumsettings.h b/sdrbase/dsp/spectrumsettings.h
index d3999ac4b..3eb3db932 100644
--- a/sdrbase/dsp/spectrumsettings.h
+++ b/sdrbase/dsp/spectrumsettings.h
@@ -75,6 +75,7 @@ public:
 	QList<SpectrumHistogramMarker> m_histogramMarkers;
 	QList<SpectrumWaterfallMarker> m_waterfallMarkers;
 	QList<SpectrumAnnotationMarker> m_annoationMarkers;
+	MarkersDisplay m_markersDisplay;
 	static const int m_log2FFTSizeMin = 6;   // 64
 	static const int m_log2FFTSizeMax = 15;  // 32k
 
diff --git a/sdrgui/gui/glspectrum.cpp b/sdrgui/gui/glspectrum.cpp
index 54453ca57..1ffc9489a 100644
--- a/sdrgui/gui/glspectrum.cpp
+++ b/sdrgui/gui/glspectrum.cpp
@@ -448,6 +448,16 @@ void GLSpectrum::setAnnotationMarkers(const QList<SpectrumAnnotationMarker>& ann
     update();
 }
 
+void GLSpectrum::setMarkersDisplay(SpectrumSettings::MarkersDisplay markersDisplay)
+{
+	m_mutex.lock();
+	m_markersDisplay = markersDisplay;
+	updateMarkersDisplay();
+    m_changesPending = true;
+    m_mutex.unlock();
+    update();
+}
+
 float GLSpectrum::getPowerMax() const
 {
     return m_linear ? m_powerScale.getRangeMax() : CalcDb::powerFromdB(m_powerScale.getRangeMax());
@@ -1403,6 +1413,7 @@ void GLSpectrum::drawAnnotationMarkers()
     }
 
     float h = m_annotationMarkerHeight / (float) m_histogramHeight;
+	float htop = 1.0f / (float) m_histogramHeight;
 
     for (const auto &marker : m_visibleAnnotationMarkers)
     {
@@ -1415,7 +1426,7 @@ void GLSpectrum::drawAnnotationMarkers()
         if (marker->m_bandwidth == 0)
         {
             GLfloat d[] {
-                marker->m_startPos, 0,
+                marker->m_startPos, htop,
                 marker->m_startPos, h
             };
             m_glShaderSimple.drawSegments(m_glHistogramBoxMatrix, color, d, 2);
@@ -1425,8 +1436,8 @@ void GLSpectrum::drawAnnotationMarkers()
             GLfloat q3[] {
                 marker->m_stopPos, h,
                 marker->m_startPos, h,
-                marker->m_startPos, 0,
-                marker->m_stopPos, 0
+                marker->m_startPos, htop,
+                marker->m_stopPos, htop
             };
             m_glShaderSimple.drawSurface(m_glHistogramBoxMatrix, color, q3, 4);
         }
diff --git a/sdrgui/gui/glspectrum.h b/sdrgui/gui/glspectrum.h
index 0c86ed143..d4d208a2b 100644
--- a/sdrgui/gui/glspectrum.h
+++ b/sdrgui/gui/glspectrum.h
@@ -169,6 +169,7 @@ public:
     void updateAnnotationMarkers();
     void updateMarkersDisplay();
     SpectrumSettings::MarkersDisplay& getMarkersDisplay() {  return m_markersDisplay; }
+	void setMarkersDisplay(SpectrumSettings::MarkersDisplay markersDisplay);
 
 private:
     struct ChannelMarkerState {
diff --git a/sdrgui/gui/glspectrumgui.cpp b/sdrgui/gui/glspectrumgui.cpp
index 3ec720391..08efa7dea 100644
--- a/sdrgui/gui/glspectrumgui.cpp
+++ b/sdrgui/gui/glspectrumgui.cpp
@@ -251,6 +251,7 @@ void GLSpectrumGUI::applySpectrumSettings()
     m_glSpectrum->setHistogramMarkers(m_settings.m_histogramMarkers);
     m_glSpectrum->setWaterfallMarkers(m_settings.m_waterfallMarkers);
     m_glSpectrum->setAnnotationMarkers(m_settings.m_annoationMarkers);
+    m_glSpectrum->setMarkersDisplay(m_settings.m_markersDisplay);
 }
 
 void GLSpectrumGUI::on_fftWindow_currentIndexChanged(int index)
@@ -386,6 +387,7 @@ void GLSpectrumGUI::on_markers_clicked(bool checked)
     m_settings.m_histogramMarkers = m_glSpectrum->getHistogramMarkers();
     m_settings.m_waterfallMarkers = m_glSpectrum->getWaterfallMarkers();
     m_settings.m_annoationMarkers = m_glSpectrum->getAnnotationMarkers();
+    m_settings.m_markersDisplay = m_glSpectrum->getMarkersDisplay();
 
     applySettings();
 }