diff --git a/src/classes/PMusrT0.cpp b/src/classes/PMusrT0.cpp
index b42a535b..ff677bdc 100644
--- a/src/classes/PMusrT0.cpp
+++ b/src/classes/PMusrT0.cpp
@@ -50,6 +50,7 @@ ClassImpQ(PMusrT0)
  */
 PMusrT0::PMusrT0()
 {
+  fMainCanvas = 0;
 }
 
 //--------------------------------------------------------------------------
@@ -62,6 +63,57 @@ PMusrT0::PMusrT0()
  */
 PMusrT0::PMusrT0(PRawRunData *rawRunData, unsigned int histoNo)
 {
+  cout << endl << "run Name = " << rawRunData->fRunName.Data() << ", histoNo = " << histoNo << endl;
+
+  TString str = rawRunData->fRunName + TString(" : ");
+  str += histoNo;
+
+  // feed necessary objects
+
+  // feed raw data histo
+  Int_t noOfBins = rawRunData->fDataBin[histoNo].size();
+  Double_t start = -0.5;
+  Double_t end   = noOfBins + 0.5;
+  fHisto = new TH1F("fHisto", str.Data(), noOfBins, start, end);
+  fHisto->SetMarkerStyle(21);
+  fHisto->SetMarkerSize(1);
+  fHisto->SetMarkerColor(TColor::GetColor(0,0,0)); // black
+
+  for (unsigned int i=0; i<rawRunData->fDataBin[histoNo].size(); i++) {
+    fHisto->SetBinContent(i+1, rawRunData->fDataBin[histoNo][i]);
+  }
+
+  // generate canvas etc
+  fMainCanvas = new TCanvas("fMainCanvas", str);
+
+  // add canvas menu
+  fImp = (TRootCanvas*)fMainCanvas->GetCanvasImp();
+  fBar = fImp->GetMenuBar();
+  fPopupMain = fBar->AddPopup("&MusrT0");
+
+  fPopupMain->AddEntry("&T0", P_MENU_ID_T0);
+  fPopupMain->AddSeparator();
+  fPopupMain->AddEntry("First Bkg Channel", P_MENU_ID_FIRST_BKG_CHANNEL);
+  fPopupMain->AddEntry("Last  Bkg Channel", P_MENU_ID_LAST_BKG_CHANNEL);
+  fPopupMain->AddSeparator();
+  fPopupMain->AddEntry("First Data Channel", P_MENU_ID_FIRST_DATA_CHANNEL);
+  fPopupMain->AddEntry("Last  Data Channel", P_MENU_ID_LAST_DATA_CHANNEL);
+  fPopupMain->AddSeparator();
+  fPopupMain->AddEntry("UnZoom", P_MENU_ID_UNZOOM);
+
+
+  fBar->MapSubwindows();
+  fBar->Layout();
+  fPopupMain->Connect("TGPopupMenu", "Activated(Int_t)", "PMusrT0", this, "HandleMenuPopup(Int_t)");
+
+  fMainCanvas->cd();
+  fMainCanvas->Show();
+
+  fMainCanvas->Connect("ProcessedEvent(Int_t,Int_t,Int_t,TObject*)", "PMusrT0",
+                       this, "HandleCmdKey(Int_t,Int_t,Int_t,TObject*)");
+
+  // draw histos etc
+  fHisto->Draw("p");
 }
 
 //--------------------------------------------------------------------------
@@ -72,6 +124,14 @@ PMusrT0::PMusrT0(PRawRunData *rawRunData, unsigned int histoNo)
  */
 PMusrT0::~PMusrT0()
 {
+  if (fMainCanvas) {
+    delete fMainCanvas;
+    fMainCanvas = 0;
+  }
+  if (fHisto) {
+    delete fHisto;
+    fHisto = 0;
+  }
 }
 
 //--------------------------------------------------------------------------
@@ -134,6 +194,36 @@ void PMusrT0::HandleMenuPopup(Int_t id)
 {
 }
 
+//--------------------------------------------------------------------------
+// HandleMenuPopup (SLOT)
+//--------------------------------------------------------------------------
+/**
+ * <p>
+ *
+ */
+void PMusrT0::SetMsrHandler(PMsrHandler *msrHandler)
+{
+  fMsrHandler = msrHandler;
+
+  InitDataAndBkg();
+}
+
+//--------------------------------------------------------------------------
+// HandleMenuPopup (SLOT)
+//--------------------------------------------------------------------------
+/**
+ * <p>
+ *
+ */
+void PMusrT0::InitDataAndBkg()
+{
+  // feed data range histo
+
+  // feed background histo
+
+  // add lines
+}
+
 //--------------------------------------------------------------------------
 // END
 //--------------------------------------------------------------------------
diff --git a/src/include/PMusrT0.h b/src/include/PMusrT0.h
index 08e8efe9..35efde4c 100644
--- a/src/include/PMusrT0.h
+++ b/src/include/PMusrT0.h
@@ -38,8 +38,21 @@
 #include <TRootCanvas.h>
 #include <TGMenu.h>
 #include <TCanvas.h>
+#include <TH1.h>
+#include <TLine.h>
 
 #include "PMusr.h"
+#ifndef __MAKECINT__
+#include "PMsrHandler.h"
+#endif // __MAKECINT__
+
+// Canvas menu id's
+#define P_MENU_ID_T0                 100
+#define P_MENU_ID_FIRST_BKG_CHANNEL  101
+#define P_MENU_ID_LAST_BKG_CHANNEL   102
+#define P_MENU_ID_FIRST_DATA_CHANNEL 103
+#define P_MENU_ID_LAST_DATA_CHANNEL  104
+#define P_MENU_ID_UNZOOM             105
 
 //--------------------------------------------------------------------------
 /**
@@ -54,11 +67,39 @@ class PMusrT0 : public TObject, public TQObject
 
     virtual ~PMusrT0();
 
-  private:
     virtual void Done(Int_t status=0); // *SIGNAL*
     virtual void HandleCmdKey(Int_t event, Int_t x, Int_t y, TObject *selected); // SLOT
     virtual void HandleMenuPopup(Int_t id); // SLOT
 
+#ifndef __MAKECINT__
+    virtual void SetMsrHandler(PMsrHandler *msrHandler);
+#endif // __MAKECINT__
+
+  private:
+#ifndef __MAKECINT__
+    PMsrHandler        *fMsrHandler;
+#endif // __MAKECINT__
+
+    // canvas menu related variables
+    TRootCanvas *fImp;
+    TGMenuBar   *fBar;
+    TGPopupMenu *fPopupMain;
+
+    // canvas related variables
+    TCanvas   *fMainCanvas;
+
+    TH1F *fHisto;
+    TH1F *fData;
+    TH1F *fBkg;
+
+    TLine *fT0Line;
+    TLine *fFirstBkgLine;
+    TLine *fLastBkgLine;
+    TLine *fFirstDataLine;
+    TLine *fLastDataLine;
+
+    void InitDataAndBkg();
+
   ClassDef(PMusrT0, 1)
 };
 
diff --git a/src/musrt0.cpp b/src/musrt0.cpp
index 77fb553f..6af81305 100644
--- a/src/musrt0.cpp
+++ b/src/musrt0.cpp
@@ -62,6 +62,34 @@ void musrt0_syntax()
   cout << endl << endl;
 }
 
+//--------------------------------------------------------------------------
+/**
+ * <p>
+ *
+ */
+bool musrt0_item(TApplication &app, PMsrHandler *msrHandler, PRawRunData *rawRunData, unsigned int histoNo)
+{
+  PMusrT0 *musrT0 = new PMusrT0(rawRunData, histoNo);
+
+  if (musrT0 == 0) {
+    cout << endl << "**ERROR** Couldn't invoke musrT0 ...";
+    cout << endl << "          run name " << rawRunData->fRunName.Data();
+    cout << endl << "          histo No " << histoNo;
+    cout << endl;
+    return false;
+  }
+
+  musrT0->SetMsrHandler(msrHandler);
+
+  musrT0->Connect("Done(Int_t)", "TApplication", &app, "Terminate(Int_t)");
+
+  app.Run(true); // true needed that Run will return after quit
+  delete musrT0;
+  musrT0 = 0;
+
+  return true;
+}
+
 //--------------------------------------------------------------------------
 int main(int argc, char *argv[])
 {
@@ -165,40 +193,37 @@ int main(int argc, char *argv[])
   }
 
 
-  vector<PMusrT0*> t0Vector;
   if (success) {
-/*
     // generate Root application needed for PMusrCanvas
     TApplication app("App", &argc, argv);
-*/
+
     // generate vector of all necessary PMusrT0 objects
-    PMusrT0 *musrT0;
     for (unsigned int i=0; i<runList->size(); i++) {
       switch (runList->at(i).fFitType) {
         case MSR_FITTYPE_SINGLE_HISTO:
           for (unsigned int j=0; j<runList->at(i).fRunName.size(); j++) { // necessary in case of ADDRUN
-            musrT0 = new PMusrT0(dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fForwardHistoNo);
-            t0Vector.push_back(musrT0);
+            if (!musrt0_item(app, msrHandler, dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fForwardHistoNo))
+              exit(0);
           }
           break;
         case MSR_FITTYPE_ASYM:
           for (unsigned int j=0; j<runList->at(i).fRunName.size(); j++) { // necessary in case of ADDRUN
-            musrT0 = new PMusrT0(dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fForwardHistoNo);
-            t0Vector.push_back(musrT0);
-            musrT0 = new PMusrT0(dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fBackwardHistoNo);
-            t0Vector.push_back(musrT0);
+            if (!musrt0_item(app, msrHandler, dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fForwardHistoNo))
+              exit(0);
+            if (!musrt0_item(app, msrHandler, dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fBackwardHistoNo))
+              exit(0);
           }
           break;
         case MSR_FITTYPE_ASYM_RRF:
           for (unsigned int j=0; j<runList->at(i).fRunName.size(); j++) { // necessary in case of ADDRUN
-            musrT0 = new PMusrT0(dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fForwardHistoNo);
-            t0Vector.push_back(musrT0);
-            musrT0 = new PMusrT0(dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fBackwardHistoNo);
-            t0Vector.push_back(musrT0);
-            musrT0 = new PMusrT0(dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fRightHistoNo);
-            t0Vector.push_back(musrT0);
-            musrT0 = new PMusrT0(dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fLeftHistoNo);
-            t0Vector.push_back(musrT0);
+            if (!musrt0_item(app, msrHandler, dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fForwardHistoNo))
+              exit(0);
+            if (!musrt0_item(app, msrHandler, dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fBackwardHistoNo))
+              exit(0);
+            if (!musrt0_item(app, msrHandler, dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fRightHistoNo))
+              exit(0);
+            if (!musrt0_item(app, msrHandler, dataHandler->GetRunData(runList->at(i).fRunName[j]), runList->at(i).fLeftHistoNo))
+              exit(0);
           }
           break;
         default:
@@ -289,15 +314,6 @@ cout << endl;
     delete dataHandler;
     dataHandler = 0;
   }
-  if (t0Vector.size() > 0) {
-    for (unsigned int i=0; i<t0Vector.size(); i++) {
-      if (t0Vector[i] != 0) {
-        delete t0Vector[i];
-        t0Vector[i] = 0;
-      }
-    }
-    t0Vector.clear();
-  }
 
   return 0;
 }