diff --git a/src/org/ntlab/deltaViewer/CollaborationViewer.java b/src/org/ntlab/deltaViewer/CollaborationViewer.java
index 8e238d4..f1ac2ad 100644
--- a/src/org/ntlab/deltaViewer/CollaborationViewer.java
+++ b/src/org/ntlab/deltaViewer/CollaborationViewer.java
@@ -382,7 +382,7 @@
 				MethodExecution coordinator = objectCallGraph.getStartPoints().get(0);
 				String coordinatorObjId = coordinator.getThisObjId();
 				String coordinatorClassName = coordinator.getThisClassName();
-				mxICell coordinatorObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), coordinatorObjId, coordinatorClassName, 0, 0, DEFAULT_OBJECT_VERTEX_SIZE.getWidth(), DEFAULT_OBJECT_VERTEX_SIZE.getHeight(), "fillColor=white"); //creates a white vertex. 
+				mxICell coordinatorObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), coordinatorObjId, formatClassName(coordinatorClassName), 0, 0, DEFAULT_OBJECT_VERTEX_SIZE.getWidth(), DEFAULT_OBJECT_VERTEX_SIZE.getHeight(), "fillColor=white"); //creates a white vertex. 
 				objectToVertexMap.put(coordinatorObjId, new ObjectVertex(coordinatorClassName, coordinatorObjVxCell, 0, 0));
 			}
 			
@@ -397,7 +397,7 @@
 						if (srcClassName.contains("[L")) {
 							srcClassName = formatArrayName(srcClassName);
 						}
-						mxICell srcObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), srcObjId, srcClassName, 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
+						mxICell srcObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), srcObjId, formatClassName(srcClassName), 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
 						objectToVertexMap.put(srcObjId, new ObjectVertex(ref.getSrcClassName(), srcObjVxCell, 0, 0));
 					}
 					// dstSide
@@ -408,7 +408,7 @@
 						if (dstClassName.contains("[L")) {
 							dstClassName = formatArrayName(dstClassName);
 						}
-						mxICell dstObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), dstObjId, dstClassName, 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 		
+						mxICell dstObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), dstObjId, formatClassName(dstClassName), 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 		
 						objectToVertexMap.put(dstObjId, new ObjectVertex(ref.getDstClassName(), dstObjVxCell, 0, 0));							
 					}
 				} else {
@@ -418,7 +418,7 @@
 						if (srcClassName.contains("[L")) {
 							srcClassName = formatArrayName(srcClassName);
 						}
-						mxICell srcObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), srcObjId, srcClassName, 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
+						mxICell srcObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), srcObjId, formatClassName(srcClassName), 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
 						objectToVertexMap.put(srcObjId, new ObjectVertex(ref.getSrcClassName(), srcObjVxCell, 0, 0));
 					}
 					String dstObjId = ref.getDstObjectId();
@@ -437,7 +437,7 @@
 						// When both of the calling and called methods are static.
 						String thisObjId = alias.getObjectId();
 						String thisClassName = alias.getMethodExecution().getThisClassName();
-						mxICell thisObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), thisObjId, thisClassName, 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
+						mxICell thisObjVxCell = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), thisObjId, formatClassName(thisClassName), 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
 						objectToVertexMap.put(thisObjId, new ObjectVertex(thisClassName, thisObjVxCell, 0, 0));
 					}
 				} else if (alias.getAliasType() == Alias.AliasType.FORMAL_PARAMETER) {
@@ -448,7 +448,7 @@
 					}
 					if (!objectToVertexMap.containsKey(thisObjId)) {
 						// When the called method is static.
-						mxICell vertex = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), thisObjId, thisClassName, 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
+						mxICell vertex = (mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), thisObjId, formatClassName(thisClassName), 0, 0, objVxWid, ObjVxHt, "fillColor=white"); //creates a white vertex. 
 						objectToVertexMap.put(thisObjId, new ObjectVertex(thisClassName, vertex, 0, 0));
 					}
 				}
diff --git a/src/org/ntlab/deltaViewer/MagnetRONFrame.java b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
index b90ccdb..4168f04 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONFrame.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
@@ -632,9 +632,9 @@
 							slider.setMinimum(0);
 							slider.setMaximum(aliasList.size());
 							slider.setPaintTicks(true);
-							slider.setMajorTickSpacing(1);
-							slider.setPaintLabels(true);
-
+						    slider.setMajorTickSpacing(5);
+						    slider.setMinorTickSpacing(1);
+						    slider.setPaintLabels(true);
 							fFeatureChanged = false;
 						}
 
diff --git a/src/org/ntlab/deltaViewer/MagnetRONViewer.java b/src/org/ntlab/deltaViewer/MagnetRONViewer.java
index 49e6479..12a57ac 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONViewer.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONViewer.java
@@ -259,7 +259,7 @@
 			try {
 				// Creates a white mxICell of ObjectVertex. 
 				objVxCell = 
-						(mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), alias.getObjectId(), objVx.getLabel(), 
+						(mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), alias.getObjectId(), formatClassName(objVx.getLabel()), 
 								srcObjVxCellAbsPt.getX() + overlapWid, srcObjVxCellAbsPt.getY() + overlapHt, 
 								DEFAULT_OBJECT_VERTEX_SIZE.getWidth(), DEFAULT_OBJECT_VERTEX_SIZE.getHeight(), 
 								"fillColor=white");
@@ -326,7 +326,7 @@
 			try {
 				// Creates a white mxIcell of ObjectVertex. 
 				objVxCell = 
-						(mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), objVx.getLabel(), objVx.getLabel(), 
+						(mxICell) mxgraph.insertDeltaVertex(getMxDefaultParent(), objVx.getLabel(), formatClassName(objVx.getLabel()), 
 								srcObjVxCellAbsPt.getX() + overlapWidth, srcObjVxCellAbsPt.getY() + overlapHeight, 
 								DEFAULT_OBJECT_VERTEX_SIZE.getWidth(), DEFAULT_OBJECT_VERTEX_SIZE.getHeight(), 
 								"fillColor=white");
@@ -1726,6 +1726,12 @@
 		return names;
 	}
 
+	protected String formatClassName(String className) {
+		// Step1 : split "."
+		String[] classNames = className.split("\\.");
+		return classNames[classNames.length - 1];
+	}
+
 	protected String formatMethodSignature(String methodSignature, String thisClassName) {
 		// TODO: Modify algorithm formatMethodSignature().
 		// Step1 : split "("
@@ -1741,7 +1747,7 @@
 		int count = methodSignature.split("\\(").length - 1;
 		if (count > 0) i -= count;
 		if (i >= 0 && !thisClassNames[thisClassNames.length - 1].equals(methodSigs[i])) {
-			if (thisClassNames[thisClassNames.length - 1].equals(methodSigs[i + 1])) i += 1;
+			if (thisClassNames[thisClassNames.length - 1].equals(methodSigs[i + 1]) || methodSigs[i].matches("[0-9]")) i += 1;
 			sb.append(methodSigs[i]);
 			if (methodSigs.length - i > 1) sb.append(".");
 		}