diff --git a/Polyhedron/demo/Polyhedron/Plugins/PCA/Clipping_box_widget.ui b/Polyhedron/demo/Polyhedron/Plugins/PCA/Clipping_box_widget.ui
index d3eb437bf524..220fa76978a9 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/PCA/Clipping_box_widget.ui
+++ b/Polyhedron/demo/Polyhedron/Plugins/PCA/Clipping_box_widget.ui
@@ -18,7 +18,7 @@
     <item>
      <widget class="QTabWidget" name="tabWidget">
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <widget class="QWidget" name="tab">
        <attribute name="title">
diff --git a/Polyhedron/demo/Polyhedron/Scene_plane_item.cpp b/Polyhedron/demo/Polyhedron/Scene_plane_item.cpp
index 630f559f4854..349114f85b4c 100644
--- a/Polyhedron/demo/Polyhedron/Scene_plane_item.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene_plane_item.cpp
@@ -1,5 +1,7 @@
 #include "Scene_plane_item.h"
 #include <QApplication>
+#include <CGAL/Three/Three.h>
+
 using namespace CGAL::Three;
 
 
@@ -186,7 +188,10 @@ Scene_plane_item* Scene_plane_item::clone() const {
 }
 
 QString Scene_plane_item::toolTip() const {
-  const CGAL::qglviewer::Vec& pos = frame->position();
+  
+  const CGAL::qglviewer::Vec offset = static_cast<CGAL::Three::Viewer_interface*>(CGAL::QGLViewer::QGLViewerPool().first())->offset();
+  
+  const CGAL::qglviewer::Vec& pos = frame->position() - offset;
   const CGAL::qglviewer::Vec& n = frame->inverseTransformOf(CGAL::qglviewer::Vec(0.f, 0.f, 1.f));
   return
     tr("<p><b>%1</b> (mode: %2, color: %3)<br />")