diff --git a/invesalius/data/styles.py b/invesalius/data/styles.py
index 360ccc3..73a89c4 100644
--- a/invesalius/data/styles.py
+++ b/invesalius/data/styles.py
@@ -117,6 +117,10 @@ class DefaultInteractorStyle(BaseImageInteractorStyle):
 
         self.AddObserver("MouseWheelForwardEvent",self.OnScrollForward)
         self.AddObserver("MouseWheelBackwardEvent", self.OnScrollBackward)
+        self.AddObserver("EnterEvent",self.OnFocus)
+
+    def OnFocus(self, evt, obj):
+        self.viewer.SetFocus()
 
     def OnZoomRightMove(self, evt, obj):
         if (self.right_pressed):
--
libgit2 0.21.2