diff -r 3d66ca73df55 -r 9f157d9c725b src/FingersDance.ViewModel/AnnotationViewModel.cs
--- a/src/FingersDance.ViewModel/AnnotationViewModel.cs	Tue Oct 13 19:09:46 2009 +0200
+++ b/src/FingersDance.ViewModel/AnnotationViewModel.cs	Tue Oct 13 19:33:13 2009 +0200
@@ -13,10 +13,13 @@
         private float _dur;
         private String _gestureType;
 
-        public AnnotationViewModel(Annotation a) {
+        private float _marginLeft;
+
+        public AnnotationViewModel(Annotation a, float marginLeft) {
             this._tcBegin = a.TcBegin;
             this._dur = a.Dur;
             this._gestureType = a.GestureType;
+            this._marginLeft = marginLeft;
         }
 
         public float TcBegin
@@ -51,6 +54,17 @@
                 base.OnPropertyChanged("GestureType");
             }
         }
+        public float MarginLeft
+        {
+            get { return _marginLeft; }
+            set
+            {
+                if (value == _marginLeft || float.IsNaN(value))
+                    return;
+                _marginLeft = value;
+                base.OnPropertyChanged("MarginLeft");
+            }
+        }
 
     }
 }