diff --git a/apps/opencs/CMakeLists.txt b/apps/opencs/CMakeLists.txt
index ec6f802cfa..969058dd7b 100644
--- a/apps/opencs/CMakeLists.txt
+++ b/apps/opencs/CMakeLists.txt
@@ -72,12 +72,12 @@ opencs_units_noqt (view/world
     )
 
 opencs_units (view/widget
-    scenetoolbar scenetool scenetoolmode pushbutton scenetooltoggle scenetoolrun
+    scenetoolbar scenetool scenetoolmode pushbutton scenetooltoggle scenetoolrun modebutton
     )
 
 opencs_units (view/render
     scenewidget worldspacewidget pagedworldspacewidget unpagedworldspacewidget
-    previewwidget
+    previewwidget editmode
     )
 
 opencs_units_noqt (view/render
diff --git a/apps/opencs/view/render/editmode.cpp b/apps/opencs/view/render/editmode.cpp
new file mode 100644
index 0000000000..51a137d3b3
--- /dev/null
+++ b/apps/opencs/view/render/editmode.cpp
@@ -0,0 +1,19 @@
+
+#include "editmode.hpp"
+
+#include "worldspacewidget.hpp"
+
+CSVRender::EditMode::EditMode (WorldspaceWidget *worldspaceWidget, const QIcon& icon,
+    unsigned int mask, const QString& tooltip, QWidget *parent)
+: ModeButton (icon, tooltip, parent), mWorldspaceWidget (worldspaceWidget), mMask (mask)
+{}
+
+unsigned int CSVRender::EditMode::getInteractionMask() const
+{
+    return mMask;
+}
+
+void CSVRender::EditMode::activate (CSVWidget::SceneToolbar *toolbar)
+{
+    mWorldspaceWidget->setInteractionMask (mMask);
+}
\ No newline at end of file
diff --git a/apps/opencs/view/render/editmode.hpp b/apps/opencs/view/render/editmode.hpp
new file mode 100644
index 0000000000..c3192f8ea5
--- /dev/null
+++ b/apps/opencs/view/render/editmode.hpp
@@ -0,0 +1,28 @@
+#ifndef CSV_RENDER_EDITMODE_H
+#define CSV_RENDER_EDITMODE_H
+
+#include "../widget/modebutton.hpp"
+
+namespace CSVRender
+{
+    class WorldspaceWidget;
+
+    class EditMode : public CSVWidget::ModeButton
+    {
+            Q_OBJECT
+
+            WorldspaceWidget *mWorldspaceWidget;
+            unsigned int mMask;
+
+        public:
+
+            EditMode (WorldspaceWidget *worldspaceWidget, const QIcon& icon, unsigned int mask,
+                const QString& tooltip = "", QWidget *parent = 0);
+
+            unsigned int getInteractionMask() const;
+
+            virtual void activate (CSVWidget::SceneToolbar *toolbar);
+    };
+}
+
+#endif
diff --git a/apps/opencs/view/render/pagedworldspacewidget.cpp b/apps/opencs/view/render/pagedworldspacewidget.cpp
index 49e7e1f097..66ea26f11a 100644
--- a/apps/opencs/view/render/pagedworldspacewidget.cpp
+++ b/apps/opencs/view/render/pagedworldspacewidget.cpp
@@ -21,7 +21,9 @@
 #include "../../model/world/idtable.hpp"
 
 #include "../widget/scenetooltoggle.hpp"
+#include "../widget/scenetoolmode.hpp"
 
+#include "editmode.hpp"
 #include "elements.hpp"
 
 bool CSVRender::PagedWorldspaceWidget::adjustCells()
@@ -210,6 +212,26 @@ void CSVRender::PagedWorldspaceWidget::mouseDoubleClickEvent (QMouseEvent *event
     WorldspaceWidget::mouseDoubleClickEvent(event);
 }
 
+void CSVRender::PagedWorldspaceWidget::addEditModeSelectorButtons (
+    CSVWidget::SceneToolMode *tool)
+{
+    WorldspaceWidget::addEditModeSelectorButtons (tool);
+
+    /// \todo replace EditMode with suitable subclasses
+    tool->addButton (
+        new EditMode (this, QIcon (":armor.png"), Element_Reference, "Terrain shape editing"),
+        "terrain-shape");
+    tool->addButton (
+        new EditMode (this, QIcon (":armor.png"), Element_Reference, "Terrain texture editing"),
+        "terrain-texture");
+    tool->addButton (
+        new EditMode (this, QIcon (":armor.png"), Element_Reference, "Terrain vertex paint editing"),
+        "terrain-vertex");
+    tool->addButton (
+        new EditMode (this, QIcon (":armor.png"), Element_Reference, "Terrain movement"),
+        "terrain-move");
+}
+
 void CSVRender::PagedWorldspaceWidget::updateOverlay()
 {
     if(getCamera()->getViewport())
@@ -445,9 +467,9 @@ CSVRender::WorldspaceWidget::dropRequirments CSVRender::PagedWorldspaceWidget::g
     }
 }
 
-unsigned int CSVRender::PagedWorldspaceWidget::getElementMask() const
+unsigned int CSVRender::PagedWorldspaceWidget::getVisibilityMask() const
 {
-    return WorldspaceWidget::getElementMask() | mControlElements->getSelection();
+    return WorldspaceWidget::getVisibilityMask() | mControlElements->getSelection();
 }
 
 CSVWidget::SceneToolToggle *CSVRender::PagedWorldspaceWidget::makeControlVisibilitySelector (
diff --git a/apps/opencs/view/render/pagedworldspacewidget.hpp b/apps/opencs/view/render/pagedworldspacewidget.hpp
index fe79e761e5..59540a71e6 100644
--- a/apps/opencs/view/render/pagedworldspacewidget.hpp
+++ b/apps/opencs/view/render/pagedworldspacewidget.hpp
@@ -75,10 +75,12 @@ namespace CSVRender
             virtual CSVWidget::SceneToolToggle *makeControlVisibilitySelector (
                 CSVWidget::SceneToolbar *parent);
 
-            virtual unsigned int getElementMask() const;
+            virtual unsigned int getVisibilityMask() const;
 
         protected:
 
+            virtual void addEditModeSelectorButtons (CSVWidget::SceneToolMode *tool);
+
             virtual void updateOverlay();
 
             virtual void mousePressEvent (QMouseEvent *event);
diff --git a/apps/opencs/view/render/worldspacewidget.cpp b/apps/opencs/view/render/worldspacewidget.cpp
index 9c86760640..534325e848 100644
--- a/apps/opencs/view/render/worldspacewidget.cpp
+++ b/apps/opencs/view/render/worldspacewidget.cpp
@@ -20,9 +20,11 @@
 #include "../world/physicssystem.hpp"
 
 #include "elements.hpp"
+#include "editmode.hpp"
 
 CSVRender::WorldspaceWidget::WorldspaceWidget (CSMDoc::Document& document, QWidget* parent)
-: SceneWidget (parent), mDocument(document), mSceneElements(0), mRun(0), mPhysics(0), mMouse(0)
+: SceneWidget (parent), mDocument(document), mSceneElements(0), mRun(0), mPhysics(0), mMouse(0),
+  mInteractionMask (0)
 {
     setAcceptDrops(true);
 
@@ -178,6 +180,16 @@ CSVWidget::SceneToolRun *CSVRender::WorldspaceWidget::makeRunTool (
     return mRun;
 }
 
+CSVWidget::SceneToolMode *CSVRender::WorldspaceWidget::makeEditModeSelector (
+    CSVWidget::SceneToolbar *parent)
+{
+    CSVWidget::SceneToolMode *tool = new CSVWidget::SceneToolMode (parent, "Edit Mode");
+
+    addEditModeSelectorButtons (tool);
+
+    return tool;
+}
+
 CSVRender::WorldspaceWidget::DropType CSVRender::WorldspaceWidget::getDropType (
     const std::vector< CSMWorld::UniversalId >& data)
 {
@@ -232,11 +244,21 @@ bool CSVRender::WorldspaceWidget::handleDrop (const std::vector<CSMWorld::Univer
     return false;
 }
 
-unsigned int CSVRender::WorldspaceWidget::getElementMask() const
+unsigned int CSVRender::WorldspaceWidget::getVisibilityMask() const
 {
     return mSceneElements->getSelection();
 }
 
+void CSVRender::WorldspaceWidget::setInteractionMask (unsigned int mask)
+{
+    mInteractionMask = mask | Element_CellMarker | Element_CellArrow;
+}
+
+unsigned int CSVRender::WorldspaceWidget::getInteractionMask() const
+{
+    return mInteractionMask & getVisibilityMask();
+}
+
 void CSVRender::WorldspaceWidget::addVisibilitySelectorButtons (
     CSVWidget::SceneToolToggle *tool)
 {
@@ -246,6 +268,17 @@ void CSVRender::WorldspaceWidget::addVisibilitySelectorButtons (
     tool->addButton (":armor.png", Element_Pathgrid, ":armor.png", "Pathgrid");
 }
 
+void CSVRender::WorldspaceWidget::addEditModeSelectorButtons (CSVWidget::SceneToolMode *tool)
+{
+    /// \todo replace EditMode with suitable subclasses
+    tool->addButton (
+        new EditMode (this, QIcon (":armor.png"), Element_Reference, "Reference editing"),
+        "object");
+    tool->addButton (
+        new EditMode (this, QIcon (":armor.png"), Element_Pathgrid, "Pathgrid editing"),
+        "pathgrid");
+}
+
 CSMDoc::Document& CSVRender::WorldspaceWidget::getDocument()
 {
     return mDocument;
@@ -327,7 +360,7 @@ void CSVRender::WorldspaceWidget::debugProfileAboutToBeRemoved (const QModelInde
 
 void CSVRender::WorldspaceWidget::elementSelectionChanged()
 {
-    setVisibilityMask (getElementMask());
+    setVisibilityMask (getVisibilityMask());
     flagAsModified();
     updateOverlay();
 }
diff --git a/apps/opencs/view/render/worldspacewidget.hpp b/apps/opencs/view/render/worldspacewidget.hpp
index 5bad3933d8..e54eb91e14 100644
--- a/apps/opencs/view/render/worldspacewidget.hpp
+++ b/apps/opencs/view/render/worldspacewidget.hpp
@@ -42,6 +42,7 @@ namespace CSVRender
             CSMDoc::Document& mDocument;
             CSVWorld::PhysicsSystem *mPhysics;
             MouseState *mMouse;
+            unsigned int mInteractionMask;
 
         public:
 
@@ -77,6 +78,10 @@ namespace CSVRender
             /// that is the responsibility of the calling function.
             CSVWidget::SceneToolRun *makeRunTool (CSVWidget::SceneToolbar *parent);
 
+            /// \attention The created tool is not added to the toolbar (via addTool). Doing
+            /// that is the responsibility of the calling function.
+            CSVWidget::SceneToolMode *makeEditModeSelector (CSVWidget::SceneToolbar *parent);
+
             void selectDefaultNavigationMode();
 
             static DropType getDropType(const std::vector<CSMWorld::UniversalId>& data);
@@ -90,12 +95,22 @@ namespace CSVRender
             virtual bool handleDrop (const std::vector<CSMWorld::UniversalId>& data,
                 DropType type);
 
-            virtual unsigned int getElementMask() const;
+            virtual unsigned int getVisibilityMask() const;
+
+            /// \note This function will implicitly add elements that are independent of the
+            /// selected edit mode.
+            virtual void setInteractionMask (unsigned int mask);
+
+            /// \note This function will only return those elements that are both visible and
+            /// marked for interaction.
+            unsigned int getInteractionMask() const;
 
         protected:
 
             virtual void addVisibilitySelectorButtons (CSVWidget::SceneToolToggle *tool);
 
+            virtual void addEditModeSelectorButtons (CSVWidget::SceneToolMode *tool);
+
             CSMDoc::Document& getDocument();
 
             virtual void updateOverlay();
diff --git a/apps/opencs/view/widget/modebutton.cpp b/apps/opencs/view/widget/modebutton.cpp
new file mode 100644
index 0000000000..56896b4220
--- /dev/null
+++ b/apps/opencs/view/widget/modebutton.cpp
@@ -0,0 +1,10 @@
+
+#include "modebutton.hpp"
+
+CSVWidget::ModeButton::ModeButton (const QIcon& icon, const QString& tooltip, QWidget *parent)
+: PushButton (icon, Type_Mode, tooltip, parent)
+{}
+
+void CSVWidget::ModeButton::activate (SceneToolbar *toolbar) {}
+
+void CSVWidget::ModeButton::deactivate (SceneToolbar *toolbar) {}
diff --git a/apps/opencs/view/widget/modebutton.hpp b/apps/opencs/view/widget/modebutton.hpp
new file mode 100644
index 0000000000..ac14afc952
--- /dev/null
+++ b/apps/opencs/view/widget/modebutton.hpp
@@ -0,0 +1,28 @@
+#ifndef CSV_WIDGET_MODEBUTTON_H
+#define CSV_WIDGET_MODEBUTTON_H
+
+#include "pushbutton.hpp"
+
+namespace CSVWidget
+{
+    class SceneToolbar;
+
+    /// \brief Specialist PushButton of Type_Mode for use in SceneToolMode
+    class ModeButton : public PushButton
+    {
+            Q_OBJECT
+
+        public:
+
+            ModeButton (const QIcon& icon, const QString& tooltip = "",
+                QWidget *parent = 0);
+
+            /// Default-Implementation: do nothing
+            virtual void activate (SceneToolbar *toolbar);
+
+            /// Default-Implementation: do nothing
+            virtual void deactivate (SceneToolbar *toolbar);
+    };
+}
+
+#endif
diff --git a/apps/opencs/view/widget/scenetoolbar.cpp b/apps/opencs/view/widget/scenetoolbar.cpp
index eac9bcec32..f7023b31f3 100644
--- a/apps/opencs/view/widget/scenetoolbar.cpp
+++ b/apps/opencs/view/widget/scenetoolbar.cpp
@@ -31,9 +31,20 @@ CSVWidget::SceneToolbar::SceneToolbar (int buttonSize, QWidget *parent)
     connect (focusScene, SIGNAL (activated()), this, SIGNAL (focusSceneRequest()));
 }
 
-void CSVWidget::SceneToolbar::addTool (SceneTool *tool)
+void CSVWidget::SceneToolbar::addTool (SceneTool *tool, SceneTool *insertPoint)
 {
-    mLayout->addWidget (tool, 0, Qt::AlignTop);
+    if (!insertPoint)
+        mLayout->addWidget (tool, 0, Qt::AlignTop);
+    else
+    {
+        int index = mLayout->indexOf (insertPoint);
+        mLayout->insertWidget (index+1, tool, 0, Qt::AlignTop);
+    }
+}
+
+void CSVWidget::SceneToolbar::removeTool (SceneTool *tool)
+{
+    mLayout->removeWidget (tool);
 }
 
 int CSVWidget::SceneToolbar::getButtonSize() const
diff --git a/apps/opencs/view/widget/scenetoolbar.hpp b/apps/opencs/view/widget/scenetoolbar.hpp
index 1902ba2bed..8e2c8ab00b 100644
--- a/apps/opencs/view/widget/scenetoolbar.hpp
+++ b/apps/opencs/view/widget/scenetoolbar.hpp
@@ -25,7 +25,11 @@ namespace CSVWidget
 
             SceneToolbar (int buttonSize, QWidget *parent = 0);
 
-            void addTool (SceneTool *tool);
+            /// If insertPoint==0, insert \a tool at the end of the scrollbar. Otherwise
+            /// insert tool after \a insertPoint.
+            void addTool (SceneTool *tool, SceneTool *insertPoint = 0);
+
+            void removeTool (SceneTool *tool);
 
             int getButtonSize() const;
 
diff --git a/apps/opencs/view/widget/scenetoolmode.cpp b/apps/opencs/view/widget/scenetoolmode.cpp
index caedfa3ee8..8d871cc5f4 100644
--- a/apps/opencs/view/widget/scenetoolmode.cpp
+++ b/apps/opencs/view/widget/scenetoolmode.cpp
@@ -6,9 +6,9 @@
 #include <QSignalMapper>
 
 #include "scenetoolbar.hpp"
-#include "pushbutton.hpp"
+#include "modebutton.hpp"
 
-void CSVWidget::SceneToolMode::adjustToolTip (const PushButton *activeMode)
+void CSVWidget::SceneToolMode::adjustToolTip (const ModeButton *activeMode)
 {
     QString toolTip = mToolTip;
 
@@ -21,7 +21,7 @@ void CSVWidget::SceneToolMode::adjustToolTip (const PushButton *activeMode)
 
 CSVWidget::SceneToolMode::SceneToolMode (SceneToolbar *parent, const QString& toolTip)
 : SceneTool (parent), mButtonSize (parent->getButtonSize()), mIconSize (parent->getIconSize()),
-  mToolTip (toolTip), mFirst (0)
+  mToolTip (toolTip), mFirst (0), mCurrent (0), mToolbar (parent)
 {
     mPanel = new QFrame (this, Qt::Popup);
 
@@ -44,8 +44,14 @@ void CSVWidget::SceneToolMode::showPanel (const QPoint& position)
 void CSVWidget::SceneToolMode::addButton (const std::string& icon, const std::string& id,
     const QString& tooltip)
 {
-    PushButton *button = new PushButton (QIcon (QPixmap (icon.c_str())), PushButton::Type_Mode,
-        tooltip, mPanel);
+    ModeButton *button = new ModeButton (QIcon (QPixmap (icon.c_str())), tooltip, mPanel);
+    addButton (button, id);
+}
+
+void CSVWidget::SceneToolMode::addButton (ModeButton *button, const std::string& id)
+{
+    button->setParent (mPanel);
+
     button->setSizePolicy (QSizePolicy (QSizePolicy::Fixed, QSizePolicy::Fixed));
     button->setIconSize (QSize (mIconSize, mIconSize));
     button->setFixedSize (mButtonSize, mButtonSize);
@@ -58,29 +64,40 @@ void CSVWidget::SceneToolMode::addButton (const std::string& icon, const std::st
 
     if (mButtons.size()==1)
     {
-        mFirst = button;
+        mFirst = mCurrent = button;
         setIcon (button->icon());
         button->setChecked (true);
         adjustToolTip (button);
+        mCurrent->activate (mToolbar);
     }
 }
 
 void CSVWidget::SceneToolMode::selected()
 {
-    std::map<PushButton *, std::string>::const_iterator iter =
-        mButtons.find (dynamic_cast<PushButton *> (sender()));
+    std::map<ModeButton *, std::string>::const_iterator iter =
+        mButtons.find (dynamic_cast<ModeButton *> (sender()));
 
     if (iter!=mButtons.end())
     {
         if (!iter->first->hasKeepOpen())
             mPanel->hide();
 
-        for (std::map<PushButton *, std::string>::const_iterator iter2 = mButtons.begin();
+        for (std::map<ModeButton *, std::string>::const_iterator iter2 = mButtons.begin();
             iter2!=mButtons.end(); ++iter2)
             iter2->first->setChecked (iter2==iter);
 
         setIcon (iter->first->icon());
         adjustToolTip (iter->first);
+
+        if (mCurrent!=iter->first)
+        {
+            if (mCurrent)
+                mCurrent->deactivate (mToolbar);
+
+            mCurrent = iter->first;
+            mCurrent->activate (mToolbar);
+        }
+
         emit modeChanged (iter->second);
     }
 }
\ No newline at end of file
diff --git a/apps/opencs/view/widget/scenetoolmode.hpp b/apps/opencs/view/widget/scenetoolmode.hpp
index 9959f98355..e6f462cf89 100644
--- a/apps/opencs/view/widget/scenetoolmode.hpp
+++ b/apps/opencs/view/widget/scenetoolmode.hpp
@@ -10,7 +10,7 @@ class QHBoxLayout;
 namespace CSVWidget
 {
     class SceneToolbar;
-    class PushButton;
+    class ModeButton;
 
     ///< \brief Mode selector tool
     class SceneToolMode : public SceneTool
@@ -19,13 +19,15 @@ namespace CSVWidget
 
             QWidget *mPanel;
             QHBoxLayout *mLayout;
-            std::map<PushButton *, std::string> mButtons; // widget, id
+            std::map<ModeButton *, std::string> mButtons; // widget, id
             int mButtonSize;
             int mIconSize;
             QString mToolTip;
             PushButton *mFirst;
+            ModeButton *mCurrent;
+            SceneToolbar *mToolbar;
 
-            void adjustToolTip (const PushButton *activeMode);
+            void adjustToolTip (const ModeButton *activeMode);
 
         public:
 
@@ -36,6 +38,9 @@ namespace CSVWidget
             void addButton (const std::string& icon, const std::string& id,
                 const QString& tooltip = "");
 
+            /// The ownership of \a button is transferred to *this.
+            void addButton (ModeButton *button, const std::string& id);
+
         signals:
 
             void modeChanged (const std::string& id);
diff --git a/apps/opencs/view/world/scenesubview.cpp b/apps/opencs/view/world/scenesubview.cpp
index 433bb828f0..5ddefcc6b2 100644
--- a/apps/opencs/view/world/scenesubview.cpp
+++ b/apps/opencs/view/world/scenesubview.cpp
@@ -125,6 +125,9 @@ CSVWidget::SceneToolbar* CSVWorld::SceneSubView::makeToolbar (CSVRender::Worldsp
     CSVWidget::SceneToolRun *runTool = widget->makeRunTool (toolbar);
     toolbar->addTool (runTool);
 
+    CSVWidget::SceneToolMode *editModeTool = widget->makeEditModeSelector (toolbar);
+    toolbar->addTool (editModeTool);
+
     return toolbar;
 }