diff --git a/FSUDAQ.cpp b/FSUDAQ.cpp
index bcdd1b6..a8ad4a8 100644
--- a/FSUDAQ.cpp
+++ b/FSUDAQ.cpp
@@ -1289,7 +1289,7 @@ void FSUDAQ::StopACQ(){
   // bnDigiSettings->setEnabled(true);
 
   repaint();
-  printf("================ end of %s \n", __func__);
+  // printf("================ end of %s \n", __func__);
 
 }
 
diff --git a/SingleSpectra.cpp b/SingleSpectra.cpp
index a6de8ee..f996fbe 100644
--- a/SingleSpectra.cpp
+++ b/SingleSpectra.cpp
@@ -81,98 +81,8 @@ SingleSpectra::SingleSpectra(Digitizer ** digi, unsigned int nDigi, QString rawD
       }
     });
 
-    QPushButton * bnRebinDigi = new QPushButton("Rebin Energy", this);
-    ctrlLayout->addWidget(bnRebinDigi, 0, 6, 1, 2);
-    connect(bnRebinDigi, &QPushButton::clicked, this, [=](){
-      int ID = cbDigi->currentIndex();
-      int ch = cbCh->currentIndex();
-
-      int a_Bin;
-      float a_Min, a_Max;
-
-      if( ch >= 0 ){
-        a_Bin = hist[ID][ch]->GetNBin();
-        a_Min = hist[ID][ch]->GetXMin();
-        a_Max = hist[ID][ch]->GetXMax();
-      }else{
-        a_Bin = hist2D[ID]->GetYNBin();
-        a_Min = hist2D[ID]->GetYMin();
-        a_Max = hist2D[ID]->GetYMax();
-      }
-
-      //pop up a dialog for nBin and ranhe
-
-      QDialog dialog(this);
-      dialog.setWindowTitle("Rebin histograms");
-
-      QFormLayout layout(&dialog);
-
-      QLabel * info = new QLabel(&dialog);
-      info->setStyleSheet("color:red;");
-      info->setText("This will also clear histogram!!");
-      layout.addRow(info);
-
-      QStringList nameList = {"Num. Bin", "x-Min", "x-Max"};
-      QLineEdit* lineEdit[3];
-
-      for (int i = 0; i < 3; ++i) {
-          lineEdit[i] = new QLineEdit(&dialog);
-          layout.addRow(nameList[i] + " : ", lineEdit[i]);
-      }
-      lineEdit[0]->setText(QString::number(a_Bin));
-      lineEdit[1]->setText(QString::number(a_Min));
-      lineEdit[2]->setText(QString::number(a_Max));
-
-      QLabel * msg = new QLabel(&dialog);
-      msg->setStyleSheet("color:red;");
-      layout.addRow(msg);
-
-      QDialogButtonBox buttonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, Qt::Horizontal, &dialog);
-      layout.addRow(&buttonBox);
-
-      double number[3];
-
-      QObject::connect(&buttonBox, &QDialogButtonBox::accepted, [&]() {
-          int OKcount = 0;
-          bool conversionOk = true;
-          for( int i = 0; i < 3; i++ ){
-            number[i] = lineEdit[i]->text().toDouble(&conversionOk);
-            if( conversionOk ){
-              OKcount++;
-            }else{
-              msg->setText(nameList[i] + " is invalid.");
-              return;
-            }
-          }
-
-          if( OKcount == 3 ) {
-            if( number[2] > number[1] ) {
-              dialog.accept();
-            }else{
-              msg->setText(nameList[2] + " is smaller than " + nameList[1]);
-            }
-          }
-      });
-      QObject::connect(&buttonBox, &QDialogButtonBox::rejected, [&]() { dialog.reject();});
-
-      if( dialog.exec() == QDialog::Accepted ){       
-        if( hist2D[ID] ) {
-          hist2D[ID]->RebinY((int)number[0], number[1], number[2]);
-          hist2D[ID]->rescaleAxes();
-          hist2D[ID]->UpdatePlot();
-        }
-        for( int j = 0; j < digi[ID]->GetNumInputCh(); j++){
-          if( hist[ID][j] ) {
-            hist[ID][j]->Rebin((int)number[0], number[1], number[2]);
-            hist[ID][j]->UpdatePlot();
-          }
-        }
-      }
-
-    });
-
     chkIsFillHistogram = new QCheckBox("Fill Histograms", this);
-    ctrlLayout->addWidget(chkIsFillHistogram, 0, 8);
+    ctrlLayout->addWidget(chkIsFillHistogram, 0, 6, 1, 2);
     chkIsFillHistogram->setChecked(false);
     isFillingHistograms = false;
 
diff --git a/SingleSpectra.h b/SingleSpectra.h
index 491bb99..d8ee115 100644
--- a/SingleSpectra.h
+++ b/SingleSpectra.h
@@ -59,11 +59,11 @@ public:
   unsigned short nDigi;
 
   void startWork(){ 
-    printf("timer start\n");
+    // printf("timer start\n");
     timer->start(maxFillTimeinMilliSec); 
   } 
   void stopWork(){ 
-    printf("timer stop\n");
+    // printf("timer stop\n");
     timer->stop();
     ClearInternalDataCount();
   }
@@ -132,7 +132,7 @@ public slots:
         int ch = randomChList[k];
         int lastIndex = SS->digi[ID]->GetData()->GetDataIndex(ch);
         if( lastIndex < 0 ) continue;
-        printf("--- ch %2d | last index %d \n", ch, lastIndex);
+        // printf("--- ch %2d | last index %d \n", ch, lastIndex);
 
         int loopIndex = SS->digi[ID]->GetData()->GetLoopIndex(ch);