diff --git a/sloth/gui/annotationscene.py b/sloth/gui/annotationscene.py
index 075bf95..c076cf1 100644
--- a/sloth/gui/annotationscene.py
+++ b/sloth/gui/annotationscene.py
@@ -165,7 +165,7 @@ class AnnotationScene(QGraphicsScene):
     def mouseMoveEvent(self, event):
         sp = event.scenePos()
         self.mousePositionChanged.emit(sp.x(), sp.y())
-        LOG.debug("mouseMoveEvent %s %s" % (self.sceneRect().contains(event.scenePos()), event.scenePos()))
+        #LOG.debug("mouseMoveEvent %s %s" % (self.sceneRect().contains(event.scenePos()), event.scenePos()))
         if self.inserter_ is not None:
             # insert mode
             self.inserter_.mouseMoveEvent(event, self.image_item_)
diff --git a/sloth/gui/frameviewer.py b/sloth/gui/frameviewer.py
index 1e03dac..87984c9 100644
--- a/sloth/gui/frameviewer.py
+++ b/sloth/gui/frameviewer.py
@@ -18,6 +18,7 @@ class GraphicsView(QGraphicsView):
         QGraphicsView.__init__(self, parent)
         self.setDragMode(QGraphicsView.RubberBandDrag)
         #self.setDragMode(QGraphicsView.ScrollHandDrag)
+        self.setMouseTracking(True)
         self.setRenderHints(QPainter.Antialiasing | QPainter.SmoothPixmapTransform | QPainter.TextAntialiasing);
         self.setStyleSheet("QFrame { border: 3px solid black }");
         self.active_ = False