diff --git a/Modules/QtWidgets/src/QmitkDataStorageTreeInspector.cpp b/Modules/QtWidgets/src/QmitkDataStorageTreeInspector.cpp
index 77835648b0..e82eccdf68 100644
--- a/Modules/QtWidgets/src/QmitkDataStorageTreeInspector.cpp
+++ b/Modules/QtWidgets/src/QmitkDataStorageTreeInspector.cpp
@@ -1,63 +1,65 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical Image Computing.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #include <QmitkDataStorageTreeInspector.h>
 
 #include <QmitkDataStorageSimpleTreeModel.h>
 
 QmitkDataStorageTreeInspector::QmitkDataStorageTreeInspector(QWidget* parent/* = nullptr*/)
   : QmitkAbstractDataStorageInspector(parent)
 {
   m_Controls.setupUi(this);
 
   m_Controls.view->setSelectionMode(QAbstractItemView::ExtendedSelection);
   m_Controls.view->setSelectionBehavior(QAbstractItemView::SelectRows);
   m_Controls.view->setAlternatingRowColors(true);
   m_Controls.view->setHeaderHidden(true);
   m_Controls.view->setTextElideMode(Qt::ElideMiddle);
 
   m_StorageModel = new QmitkDataStorageSimpleTreeModel(this);
 
   m_Controls.view->setModel(m_StorageModel);
 }
 
 QAbstractItemView* QmitkDataStorageTreeInspector::GetView()
 {
   return m_Controls.view;
 };
 
 QAbstractItemView* QmitkDataStorageTreeInspector::GetView() const
 {
   return m_Controls.view;
 };
 
 void QmitkDataStorageTreeInspector::Initialize()
 {
   m_StorageModel->SetDataStorage(m_DataStorage.Lock());
   m_StorageModel->SetNodePredicate(m_NodePredicate);
 
   m_Connector->SetView(m_Controls.view);
+
+  m_Controls.view->expandAll();
 }
 
 void QmitkDataStorageTreeInspector::SetSelectionMode(SelectionMode mode)
 {
   m_Controls.view->setSelectionMode(mode);
 }
 
 QmitkDataStorageTreeInspector::SelectionMode QmitkDataStorageTreeInspector::GetSelectionMode() const
 {
   return m_Controls.view->selectionMode();
 };