diff --git a/sdrbase/dsp/scopevisng.cpp b/sdrbase/dsp/scopevisng.cpp
index a348157bf..b853e8681 100644
--- a/sdrbase/dsp/scopevisng.cpp
+++ b/sdrbase/dsp/scopevisng.cpp
@@ -31,7 +31,6 @@ MESSAGE_CLASS_DEFINITION(ScopeVisNG::MsgScopeVisNGRemoveTrace, Message)
 const uint ScopeVisNG::m_traceChunkSize = 4800;
 const Real ScopeVisNG::ProjectorMagDB::mult = (10.0f / log2f(10.0f));
 
-
 ScopeVisNG::ScopeVisNG(GLScopeNG* glScope) :
     m_glScope(glScope),
     m_preTriggerDelay(0),
@@ -479,7 +478,7 @@ bool ScopeVisNG::handleMessage(const Message& message)
     {
         MsgScopeVisNGAddTrigger& conf = (MsgScopeVisNGAddTrigger&) message;
         m_triggerConditions.push_back(TriggerCondition(conf.getTriggerData()));
-        m_triggerConditions.back().init();
+        m_triggerConditions.back().initProjector();
         return true;
     }
     else if (MsgScopeVisNGChangeTrigger::match(message))
@@ -499,6 +498,7 @@ bool ScopeVisNG::handleMessage(const Message& message)
         int triggerIndex = conf.getTriggerIndex();
 
         if (triggerIndex < m_triggerConditions.size()) {
+            m_triggerConditions[triggerIndex].releaseProjector();
             m_triggerConditions.erase(m_triggerConditions.begin() + triggerIndex);
         }
 
diff --git a/sdrbase/dsp/scopevisng.h b/sdrbase/dsp/scopevisng.h
index 7aa232bd9..86bef4a32 100644
--- a/sdrbase/dsp/scopevisng.h
+++ b/sdrbase/dsp/scopevisng.h
@@ -360,17 +360,6 @@ private:
             }
 
             return dPhi;
-
-//            Real dPhi = curArg - m_prevArg;
-//            m_prevArg = curArg;
-//
-//            if (dPhi < -M_PI) {
-//                dPhi += 2.0 * M_PI;
-//            } else if (dPhi > M_PI) {
-//                dPhi -= 2.0 * M_PI;
-//            }
-//
-//            return dPhi/M_PI;
         }
 
     private:
@@ -430,14 +419,18 @@ private:
 
         ~TriggerCondition()
         {
-            if (m_projector) delete m_projector;
         }
 
-        void init()
+        void initProjector()
         {
             m_projector = createProjector(m_triggerData.m_projectionType);
         }
 
+        void releaseProjector()
+        {
+            delete m_projector;
+        }
+
         void setData(const TriggerData& triggerData)
         {
             m_triggerData = triggerData;
diff --git a/sdrbase/gui/glscopenggui.cpp b/sdrbase/gui/glscopenggui.cpp
index ab2b128c9..c63957eab 100644
--- a/sdrbase/gui/glscopenggui.cpp
+++ b/sdrbase/gui/glscopenggui.cpp
@@ -257,6 +257,31 @@ void GLScopeNGGUI::on_traceLen_valueChanged(int value)
     setTimeOfsDisplay();
 }
 
+void GLScopeNGGUI::on_trig_valueChanged(int value)
+{
+    ui->trigText->setText(tr("%1").arg(value));
+}
+
+void GLScopeNGGUI::on_trigAdd_clicked(bool checked)
+{
+    if (ui->trig->maximum() < 9)
+    {
+        ScopeVisNG::TriggerData triggerData;
+        fillTriggerData(triggerData);
+        m_scopeVis->addTrigger(triggerData);
+        ui->trig->setMaximum(ui->trig->maximum() + 1);
+    }
+}
+
+void GLScopeNGGUI::on_trigDel_clicked(bool checked)
+{
+    if (ui->trig->maximum() > 0)
+    {
+        m_scopeVis->removeTrigger(ui->trig->value());
+        ui->trig->setMaximum(ui->trig->maximum() - 1);
+    }
+}
+
 void GLScopeNGGUI::on_traceMode_currentIndexChanged(int index)
 {
     setAmpScaleDisplay();
@@ -656,6 +681,11 @@ void GLScopeNGGUI::fillTriggerData(ScopeVisNG::TriggerData& triggerData)
     triggerData.m_triggerDelay = (int) (m_traceLenMult * ScopeVisNG::m_traceChunkSize * delayMult);
 }
 
+void GLScopeNGGUI::setTriggerUI(ScopeVisNG::TriggerData& triggerData)
+{
+
+}
+
 void GLScopeNGGUI::applySettings()
 {
 }
diff --git a/sdrbase/gui/glscopenggui.h b/sdrbase/gui/glscopenggui.h
index 1d6b21f3e..57269c613 100644
--- a/sdrbase/gui/glscopenggui.h
+++ b/sdrbase/gui/glscopenggui.h
@@ -83,6 +83,7 @@ private:
 
     void fillTraceData(ScopeVisNG::TraceData& traceData);
     void fillTriggerData(ScopeVisNG::TriggerData& triggerData);
+    void setTriggerUI(ScopeVisNG::TriggerData& triggerData);
 
     void fillProjectionCombo(QComboBox* comboBox);
 
@@ -106,6 +107,9 @@ private slots:
     void on_ofsFine_valueChanged(int value);
     void on_traceDelay_valueChanged(int value);
     // Third row
+    void on_trig_valueChanged(int value);
+    void on_trigAdd_clicked(bool checked);
+    void on_trigDel_clicked(bool checked);
     void on_trigMode_currentIndexChanged(int index);
     void on_trigCount_valueChanged(int value);
     void on_trigPos_toggled(bool checked);
diff --git a/sdrbase/gui/glscopenggui.ui b/sdrbase/gui/glscopenggui.ui
index a2cc681e4..21168a026 100644
--- a/sdrbase/gui/glscopenggui.ui
+++ b/sdrbase/gui/glscopenggui.ui
@@ -700,7 +700,7 @@ kS/s</string>
       <widget class="QLabel" name="ampText">
        <property name="minimumSize">
         <size>
-         <width>32</width>
+         <width>36</width>
          <height>0</height>
         </size>
        </property>
@@ -749,7 +749,7 @@ kS/s</string>
       <widget class="QLabel" name="ofsText">
        <property name="minimumSize">
         <size>
-         <width>32</width>
+         <width>36</width>
          <height>0</height>
         </size>
        </property>
@@ -1292,7 +1292,7 @@ kS/s</string>
       <widget class="QLabel" name="trigLevelText">
        <property name="minimumSize">
         <size>
-         <width>32</width>
+         <width>36</width>
          <height>0</height>
         </size>
        </property>