diff --git a/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionControl.py b/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionControl.py
index d1184d739879..0be5fe4e9a05 100644
--- a/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionControl.py
+++ b/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionControl.py
@@ -13,8 +13,8 @@
     import mantid
     IMPORT_MANTID = True
 except ImportError as e:
-    #sys.path.append('/home/wzz/Mantid_Project/Mantid2/Code/release/bin')
-    sys.path.append('/home/wzz/Mantid/Code/debug/bin')
+    sys.path.append('/home/wzz/Mantid_Project/Mantid2/Code/release/bin')
+    #sys.path.append('/home/wzz/Mantid/Code/debug/bin')
     sys.path.append('/Users/wzz/Mantid/Code/debug/bin')
     try:
         import mantid
diff --git a/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionGUI.py b/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionGUI.py
index 5acf9c4ac1e2..6c2c2ab83cd4 100644
--- a/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionGUI.py
+++ b/Code/Mantid/scripts/HFIRPowderReduction/HfirPDReductionGUI.py
@@ -120,6 +120,9 @@ def __init__(self, parent=None):
         self.connect(self.ui.pushButton_mergeScans, QtCore.SIGNAL('clicked()'),
                 self.doMergeScans)
 
+        self.connect(self.ui.pushButton_view2D, QtCore.SIGNAL('clicked()'), 
+                self.doMergeScanView2D)
+
         # Define signal-event handling
 
 
@@ -462,7 +465,21 @@ def doMergeScans(self):
         self._plotMergedReducedData(mindex, label)
         
         return
-    
+
+    def doMergeScanView2D(self):
+        """
+        """
+        # TODO : ASAP
+
+        # Highlight button color
+        self.ui.pushButton_view2D.setStyleSheet('QPushButton {background-color: #A3C1DA; color: red;}')
+
+        # Plot 2D
+
+
+        return
+
+
 
     def doPlot2Theta(self):
         """ Rebin the data and plot in 2theta
diff --git a/Code/Mantid/scripts/HFIRPowderReduction/testGUI_MergeRuns.py b/Code/Mantid/scripts/HFIRPowderReduction/testGUI_MergeRuns.py
index 0b57f215840a..eefb031243f5 100644
--- a/Code/Mantid/scripts/HFIRPowderReduction/testGUI_MergeRuns.py
+++ b/Code/Mantid/scripts/HFIRPowderReduction/testGUI_MergeRuns.py
@@ -29,24 +29,28 @@
 # (20) Tab-Advanced Setup: Auto fill Server Address
 # (21) Test using Local Data Storage
 #
+# Use cases to test in this script 
+# 1. Load a set of scans in an experiment;
+#  > plot merged result as default.
+# 2. PushButton 'View 2D': color fill plot on all individual experiments;
+# 3. PushButton 'View Merged': 1D plot for previously merged;
+# 4. Mode 'Show scan number' alog with 'View 2D';   
+#  > Show to user which scan is at the mouse;
+# 5. Right click mouse to get a submenu for 'include/exclude' (disable one)
+# 6. Select or deselect a run from GUI and re-merge;
+#
+# Note: step 4, 5 and 6 should be referred to PlotData.MainAppNDim.py
 #
 ###############################################################################
-
-""" Test main """
 import sys
 
 import HfirPDReductionGUI
 from PyQt4 import QtGui
 
-
 # Globals
 LINUX = 1
 OSX   = 2
 
-
-
-##########
-
 def qapp():
     if QtGui.QApplication.instance():
         _app = QtGui.QApplication.instance()
@@ -55,7 +59,14 @@ def qapp():
     return _app
 
 app = qapp()
+reducer = HfirPDReductionGUI.MainWindow() #the main ui class in this file is called MainWindow
+reducer.show()
 
+""" END OF COMMON CODES """
+
+
+#-------------------------------------------------------------------------------
+""" Determine OS """
 
 import sys
 osname = sys.platform
@@ -68,10 +79,12 @@ def qapp():
 else:
     raise NotImplementedError("OS %s is not supported." % (osname))
 
-reducer = HfirPDReductionGUI.MainWindow() #the main ui class in this file is called MainWindow
-reducer.show()
+#-------------------------------------------------------------------------------
 
 # example: 'http://neutron.ornl.gov/user_data/hb2a/exp400/Datafiles/HB2A_exp0400_scan0001.dat'
+#
+# Test case: Experiment 231, Scan 1 to 10
+#
 print "Set to exp 231, scan 1"
 reducer.ui.lineEdit_expNo.setText('231')
 reducer.ui.lineEdit_scanStart.setText('1')
@@ -92,22 +105,8 @@ def qapp():
 # load and reduce data 
 reducer.doMergeScans()
 
-# try:
-#     reducer.doLoadData()
-# except Exception as e:
-#     print e
-#     raise e
-# 
-# try: 
-#     reducer.doPlotDspacing()
-# except Exception as e:
-#     print e
-# 
-# try: 
-#     reducer.doPlotQ()
-# except Exception as e:
-#     print e
-# 
-# Skip if there is something wrong
+
+#-------------------------------------------------------------------------------
+""" Common Codes """
 app.exec_()