diff --git a/cmake/SuperBuild/Builddtk-deps.cmake b/cmake/SuperBuild/Builddtk-deps.cmake
index 39b5fc4..64838fe 100644
--- a/cmake/SuperBuild/Builddtk-deps.cmake
+++ b/cmake/SuperBuild/Builddtk-deps.cmake
@@ -1,7 +1,7 @@
 include(ExternalProject)
 
 set(dtk_GIT_REPOSITORY "https://github.com/darbyjohnston/dtk.git")
-set(dtk_GIT_TAG "0.1.0")
+set(dtk_GIT_TAG "d3fb154f63d96f3f3d8bb6b650c4165049767824")
 
 set(dtk-deps_ARGS
     ${toucan_EXTERNAL_PROJECT_ARGS}
diff --git a/cmake/SuperBuild/Builddtk.cmake b/cmake/SuperBuild/Builddtk.cmake
index 7a9956d..9d8398a 100644
--- a/cmake/SuperBuild/Builddtk.cmake
+++ b/cmake/SuperBuild/Builddtk.cmake
@@ -1,7 +1,7 @@
 include(ExternalProject)
 
 set(dtk_GIT_REPOSITORY "https://github.com/darbyjohnston/dtk.git")
-set(dtk_GIT_TAG "0.1.0")
+set(dtk_GIT_TAG "d3fb154f63d96f3f3d8bb6b650c4165049767824")
 
 set(dtk_DEPS dtk-deps)
 set(dtk_ARGS
diff --git a/lib/toucanView/CMakeLists.txt b/lib/toucanView/CMakeLists.txt
index a6c13bd..e1512d9 100644
--- a/lib/toucanView/CMakeLists.txt
+++ b/lib/toucanView/CMakeLists.txt
@@ -1,6 +1,5 @@
 set(HEADERS
     App.h
-    BottomBar.h
     ClipItem.h
     DocumentTab.h
     Document.h
@@ -11,8 +10,9 @@ set(HEADERS
     GraphTool.h
     IItem.h
     IToolWidget.h
-    InspectorTool.h
+    JSONTool.h
     MenuBar.h
+    PlaybackBar.h
     PlaybackModel.h
     SelectionModel.h
     StackItem.h
@@ -30,7 +30,6 @@ set(HEADERS
 
 set(SOURCE
     App.cpp
-    BottomBar.cpp
     ClipItem.cpp
     DocumentTab.cpp
     Document.cpp
@@ -41,8 +40,9 @@ set(SOURCE
     GraphTool.cpp
     IItem.cpp
     IToolWidget.cpp
-    InspectorTool.cpp
+    JSONTool.cpp
     MenuBar.cpp
+    PlaybackBar.cpp
     PlaybackModel.cpp
     SelectionModel.cpp
     StackItem.cpp
diff --git a/lib/toucanView/InspectorTool.cpp b/lib/toucanView/JSONTool.cpp
similarity index 83%
rename from lib/toucanView/InspectorTool.cpp
rename to lib/toucanView/JSONTool.cpp
index d038644..5883504 100644
--- a/lib/toucanView/InspectorTool.cpp
+++ b/lib/toucanView/JSONTool.cpp
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright Contributors to the toucan project.
 
-#include "InspectorTool.h"
+#include "JSONTool.h"
 
 #include "App.h"
 
@@ -12,12 +12,12 @@
 
 namespace toucan
 {
-    void InspectorWidget::_init(
+    void JSONWidget::_init(
         const std::shared_ptr<dtk::Context>& context,
         const OTIO_NS::SerializableObject::Retainer<OTIO_NS::Item>& item,
         const std::shared_ptr<dtk::IWidget>& parent)
     {
-        IWidget::_init(context, "toucan::InspectorWidget", parent);
+        IWidget::_init(context, "toucan::JSONWidget", parent);
 
         _item = item;
 
@@ -30,42 +30,42 @@ namespace toucan
         _bellows->setOpen(true);
     }
 
-    InspectorWidget::~InspectorWidget()
+    JSONWidget::~JSONWidget()
     {}
 
-    std::shared_ptr<InspectorWidget> InspectorWidget::create(
+    std::shared_ptr<JSONWidget> JSONWidget::create(
         const std::shared_ptr<dtk::Context>& context,
         const OTIO_NS::SerializableObject::Retainer<OTIO_NS::Item>& item,
         const std::shared_ptr<dtk::IWidget>& parent)
     {
-        auto out = std::shared_ptr<InspectorWidget>(new InspectorWidget);
+        auto out = std::shared_ptr<JSONWidget>(new JSONWidget);
         out->_init(context, item, parent);
         return out;
     }
 
-    void InspectorWidget::setOpen(bool value)
+    void JSONWidget::setOpen(bool value)
     {
         _bellows->setOpen(value);
     }
 
-    void InspectorWidget::setGeometry(const dtk::Box2I& value)
+    void JSONWidget::setGeometry(const dtk::Box2I& value)
     {
         IWidget::setGeometry(value);
         _bellows->setGeometry(value);
     }
 
-    void InspectorWidget::sizeHintEvent(const dtk::SizeHintEvent& event)
+    void JSONWidget::sizeHintEvent(const dtk::SizeHintEvent& event)
     {
         IWidget::sizeHintEvent(event);
         _setSizeHint(_bellows->getSizeHint());
     }
 
-    void InspectorTool::_init(
+    void JSONTool::_init(
         const std::shared_ptr<dtk::Context>& context,
         const std::shared_ptr<App>& app,
         const std::shared_ptr<dtk::IWidget>& parent)
     {
-        IToolWidget::_init(context, app, "toucan::InspectorTool", "Inspector", parent);
+        IToolWidget::_init(context, app, "toucan::JSONTool", "JSON", parent);
 
         _layout = dtk::VerticalLayout::create(context, shared_from_this());
         _layout->setSpacingRole(dtk::SizeRole::None);
@@ -130,7 +130,7 @@ namespace toucan
                             auto context = getContext();
                             for (const auto& item : selection)
                             {
-                                auto widget = InspectorWidget::create(context, item, _scrollLayout);
+                                auto widget = JSONWidget::create(context, item, _scrollLayout);
                                 _widgets.push_back(widget);
                             }
                         });
@@ -147,26 +147,26 @@ namespace toucan
             });
     }
 
-    InspectorTool::~InspectorTool()
+    JSONTool::~JSONTool()
     {}
 
-    std::shared_ptr<InspectorTool> InspectorTool::create(
+    std::shared_ptr<JSONTool> JSONTool::create(
         const std::shared_ptr<dtk::Context>& context,
         const std::shared_ptr<App>& app,
         const std::shared_ptr<dtk::IWidget>& parent)
     {
-        auto out = std::shared_ptr<InspectorTool>(new InspectorTool);
+        auto out = std::shared_ptr<JSONTool>(new JSONTool);
         out->_init(context, app, parent);
         return out;
     }
 
-    void InspectorTool::setGeometry(const dtk::Box2I& value)
+    void JSONTool::setGeometry(const dtk::Box2I& value)
     {
         IToolWidget::setGeometry(value);
         _layout->setGeometry(value);
     }
 
-    void InspectorTool::sizeHintEvent(const dtk::SizeHintEvent& event)
+    void JSONTool::sizeHintEvent(const dtk::SizeHintEvent& event)
     {
         IToolWidget::sizeHintEvent(event);
         _setSizeHint(_layout->getSizeHint());
diff --git a/lib/toucanView/InspectorTool.h b/lib/toucanView/JSONTool.h
similarity index 85%
rename from lib/toucanView/InspectorTool.h
rename to lib/toucanView/JSONTool.h
index b7a7191..ec56e6e 100644
--- a/lib/toucanView/InspectorTool.h
+++ b/lib/toucanView/JSONTool.h
@@ -14,7 +14,7 @@ namespace toucan
 {
     class Document;
 
-    class InspectorWidget : public dtk::IWidget
+    class JSONWidget : public dtk::IWidget
     {
     protected:
         void _init(
@@ -23,9 +23,9 @@ namespace toucan
             const std::shared_ptr<IWidget>& parent);
 
     public:
-        virtual ~InspectorWidget();
+        virtual ~JSONWidget();
 
-        static std::shared_ptr<InspectorWidget> create(
+        static std::shared_ptr<JSONWidget> create(
             const std::shared_ptr<dtk::Context>&,
             const OTIO_NS::SerializableObject::Retainer<OTIO_NS::Item>&,
             const std::shared_ptr<IWidget>& parent = nullptr);
@@ -40,7 +40,7 @@ namespace toucan
         std::shared_ptr<dtk::Bellows> _bellows;
     };
 
-    class InspectorTool : public IToolWidget
+    class JSONTool : public IToolWidget
     {
     protected:
         void _init(
@@ -49,9 +49,9 @@ namespace toucan
             const std::shared_ptr<IWidget>& parent);
 
     public:
-        virtual ~InspectorTool();
+        virtual ~JSONTool();
 
-        static std::shared_ptr<InspectorTool> create(
+        static std::shared_ptr<JSONTool> create(
             const std::shared_ptr<dtk::Context>&,
             const std::shared_ptr<App>&,
             const std::shared_ptr<IWidget>& parent = nullptr);
@@ -65,7 +65,7 @@ namespace toucan
         std::shared_ptr<dtk::VerticalLayout> _layout;
         std::shared_ptr<dtk::ScrollWidget> _scrollWidget;
         std::shared_ptr<dtk::VerticalLayout> _scrollLayout;
-        std::vector<std::shared_ptr<InspectorWidget> > _widgets;
+        std::vector<std::shared_ptr<JSONWidget> > _widgets;
 
         std::shared_ptr<dtk::ValueObserver<std::shared_ptr<Document> > > _documentObserver;
         std::shared_ptr<dtk::ListObserver<OTIO_NS::SerializableObject::Retainer<OTIO_NS::Item> > > _selectionObserver;
diff --git a/lib/toucanView/MenuBar.cpp b/lib/toucanView/MenuBar.cpp
index fb4fe16..5d0b4b8 100644
--- a/lib/toucanView/MenuBar.cpp
+++ b/lib/toucanView/MenuBar.cpp
@@ -27,11 +27,30 @@ namespace toucan
         _documentsModel = app->getDocumentsModel();
 
         _fileMenuInit(context, app);
-        _editMenuInit(context, app);
+        _selectMenuInit(context, app);
         _timeMenuInit(context, app);
         _playbackMenuInit(context, app);
-        _viewMenuInit(context, app);
         _windowMenuInit(context, app, window);
+        _viewMenuInit(context, app);
+
+        _documentsObserver = dtk::ListObserver<std::shared_ptr<Document> >::create(
+            _documentsModel->observeDocuments(),
+            [this](const std::vector<std::shared_ptr<Document> >& documents)
+            {
+                _menus["Files"]->clear();
+                _filesActions.clear();
+                for (int i = 0; i < documents.size(); ++i)
+                {
+                    auto item = std::make_shared<dtk::Action>(
+                        documents[i]->getPath().filename().string(),
+                        [this, i]
+                        {
+                            _documentsModel->setCurrentIndex(i);
+                        });
+                    _menus["Files"]->addItem(item);
+                    _filesActions.push_back(item);
+                }
+            });
 
         _documentObserver = dtk::ValueObserver<std::shared_ptr<Document> >::create(
             _documentsModel->observeCurrent(),
@@ -39,11 +58,21 @@ namespace toucan
             {
                 _document = document;
                 _fileMenuUpdate();
-                _editMenuUpdate();
+                _selectMenuUpdate();
                 _timeMenuUpdate();
                 _playbackMenuUpdate();
-                _viewMenuUpdate();
                 _windowMenuUpdate();
+                _viewMenuUpdate();
+            });
+
+        _documentIndexObserver = dtk::ValueObserver<int>::create(
+            _documentsModel->observeCurrentIndex(),
+            [this](int index)
+            {
+                for (int i = 0; i < _filesActions.size(); ++i)
+                {
+                    _menus["Files"]->setItemChecked(_filesActions[i], i == index);
+                }
             });
     }
 
@@ -176,46 +205,17 @@ namespace toucan
                 }
             });
         _menus["File"]->addItem(_actions["File/Exit"]);
-
-        _documentsObserver = dtk::ListObserver<std::shared_ptr<Document> >::create(
-            _documentsModel->observeDocuments(),
-            [this](const std::vector<std::shared_ptr<Document> >& documents)
-            {
-                _menus["Files"]->clear();
-                _filesActions.clear();
-                for (int i = 0; i < documents.size(); ++i)
-                {
-                    auto item = std::make_shared<dtk::Action>(
-                        documents[i]->getPath().filename().string(),
-                        [this, i]
-                        {
-                            _documentsModel->setCurrentIndex(i);
-                        });
-                    _menus["Files"]->addItem(item);
-                    _filesActions.push_back(item);
-                }
-            });
-
-        _documentIndexObserver = dtk::ValueObserver<int>::create(
-            _documentsModel->observeCurrentIndex(),
-            [this](int index)
-            {
-                for (int i = 0; i < _filesActions.size(); ++i)
-                {
-                    _menus["Files"]->setItemChecked(_filesActions[i], i == index);
-                }
-            });
     }
 
-    void MenuBar::_editMenuInit(
+    void MenuBar::_selectMenuInit(
         const std::shared_ptr<dtk::Context>& context,
         const std::shared_ptr<App>& app)
     {
-        _menus["Edit"] = dtk::Menu::create(context);
-        addMenu("Edit", _menus["Edit"]);
+        _menus["Select"] = dtk::Menu::create(context);
+        addMenu("Select", _menus["Select"]);
 
-        _actions["Edit/SelectAll"] = std::make_shared<dtk::Action>(
-            "Select All",
+        _actions["Select/All"] = std::make_shared<dtk::Action>(
+            "All",
             dtk::Key::A,
             static_cast<int>(dtk::KeyModifier::Control),
             [this]
@@ -225,10 +225,10 @@ namespace toucan
                     _document->getSelectionModel()->selectAll(_document->getTimeline());
                 }
             });
-        _menus["Edit"]->addItem(_actions["Edit/SelectAll"]);
+        _menus["Select"]->addItem(_actions["Select/All"]);
 
-        _actions["Edit/SelectNone"] = std::make_shared<dtk::Action>(
-            "Select None",
+        _actions["Select/None"] = std::make_shared<dtk::Action>(
+            "None",
             dtk::Key::A,
             static_cast<int>(dtk::KeyModifier::Shift) |
             static_cast<int>(dtk::KeyModifier::Control),
@@ -239,10 +239,10 @@ namespace toucan
                     _document->getSelectionModel()->clearSelection();
                 }
             });
-        _menus["Edit"]->addItem(_actions["Edit/SelectNone"]);
+        _menus["Select"]->addItem(_actions["Select/None"]);
 
-        _actions["Edit/SelectInvert"] = std::make_shared<dtk::Action>(
-            "Invert Selection",
+        _actions["Select/Invert"] = std::make_shared<dtk::Action>(
+            "Invert",
             dtk::Key::I,
             static_cast<int>(dtk::KeyModifier::Control),
             [this]
@@ -252,7 +252,7 @@ namespace toucan
                     _document->getSelectionModel()->invertSelection(_document->getTimeline());
                 }
             });
-        _menus["Edit"]->addItem(_actions["Edit/SelectInvert"]);
+        _menus["Select"]->addItem(_actions["Select/Invert"]);
     }
 
     void MenuBar::_timeMenuInit(
@@ -430,68 +430,6 @@ namespace toucan
         _menus["Playback"]->addItem(_actions["Playback/Toggle"]);
     }
 
-    void MenuBar::_viewMenuInit(
-        const std::shared_ptr<dtk::Context>& context,
-        const std::shared_ptr<App>& app)
-    {
-        _menus["View"] = dtk::Menu::create(context);
-        addMenu("View", _menus["View"]);
-
-        _actions["View/ZoomIn"] = std::make_shared<dtk::Action>(
-            "Zoom In",
-            dtk::Key::Equal,
-            0,
-            [this]
-            {
-                if (_document)
-                {
-                    _document->getViewModel()->zoomIn();
-                }
-            });
-        _menus["View"]->addItem(_actions["View/ZoomIn"]);
-
-        _actions["View/ZoomOut"] = std::make_shared<dtk::Action>(
-            "Zoom Out",
-            dtk::Key::Minus,
-            0,
-            [this]
-            {
-                if (_document)
-                {
-                    _document->getViewModel()->zoomOut();
-                }
-            });
-        _menus["View"]->addItem(_actions["View/ZoomOut"]);
-
-        _actions["View/ZoomReset"] = std::make_shared<dtk::Action>(
-            "Zoom Reset",
-            dtk::Key::_0,
-            0,
-            [this]
-            {
-                if (_document)
-                {
-                    _document->getViewModel()->zoomReset();
-                }
-            });
-        _menus["View"]->addItem(_actions["View/ZoomReset"]);
-
-        _menus["View"]->addDivider();
-
-        _actions["View/FrameView"] = std::make_shared<dtk::Action>(
-            "Frame View",
-            dtk::Key::Backspace,
-            0,
-            [this](bool value)
-            {
-                if (_document)
-                {
-                    _document->getViewModel()->setFrame(value);
-                }
-            });
-        _menus["View"]->addItem(_actions["View/FrameView"]);
-    }
-
     void MenuBar::_windowMenuInit(
         const std::shared_ptr<dtk::Context>& context,
         const std::shared_ptr<App>& app,
@@ -527,7 +465,7 @@ namespace toucan
         const std::vector<Control> controls =
         {
             { WindowControl::ToolBar, "ToolBar", "Tool Bar" },
-            { WindowControl::BottomBar, "BottomBar", "Bottom Bar" },
+            { WindowControl::PlaybackBar, "PlaybackBar", "Playback Bar" },
             { WindowControl::TimelineWidget, "TimelineWidget", "Timeline Widget" },
             { WindowControl::Tools, "Tools", "Tools" }
         };
@@ -654,8 +592,8 @@ namespace toucan
             {
                 auto i = value.find(WindowControl::ToolBar);
                 _menus["Window"]->setItemChecked(_actions["Window/ToolBar"], i->second);
-                i = value.find(WindowControl::BottomBar);
-                _menus["Window"]->setItemChecked(_actions["Window/BottomBar"], i->second);
+                i = value.find(WindowControl::PlaybackBar);
+                _menus["Window"]->setItemChecked(_actions["Window/PlaybackBar"], i->second);
                 i = value.find(WindowControl::TimelineWidget);
                 _menus["Window"]->setItemChecked(_actions["Window/TimelineWidget"], i->second);
                 i = value.find(WindowControl::Tools);
@@ -680,6 +618,76 @@ namespace toucan
             });
     }
 
+    void MenuBar::_viewMenuInit(
+        const std::shared_ptr<dtk::Context>& context,
+        const std::shared_ptr<App>& app)
+    {
+        _menus["View"] = dtk::Menu::create(context);
+        addMenu("View", _menus["View"]);
+
+        _actions["View/ZoomIn"] = std::make_shared<dtk::Action>(
+            "Zoom In",
+            "ViewZoomIn",
+            dtk::Key::Equal,
+            0,
+            [this]
+            {
+                if (_document)
+                {
+                    _document->getViewModel()->zoomIn();
+                }
+            });
+        _actions["View/ZoomIn"]->toolTip = "View zoom in";
+        _menus["View"]->addItem(_actions["View/ZoomIn"]);
+
+        _actions["View/ZoomOut"] = std::make_shared<dtk::Action>(
+            "Zoom Out",
+            "ViewZoomOut",
+            dtk::Key::Minus,
+            0,
+            [this]
+            {
+                if (_document)
+                {
+                    _document->getViewModel()->zoomOut();
+                }
+            });
+        _actions["View/ZoomOut"]->toolTip = "View zoom out";
+        _menus["View"]->addItem(_actions["View/ZoomOut"]);
+
+        _actions["View/ZoomReset"] = std::make_shared<dtk::Action>(
+            "Zoom Reset",
+            "ViewZoomReset",
+            dtk::Key::_0,
+            0,
+            [this]
+            {
+                if (_document)
+                {
+                    _document->getViewModel()->zoomReset();
+                }
+            });
+        _actions["View/ZoomReset"]->toolTip = "Reset the view zoom";
+        _menus["View"]->addItem(_actions["View/ZoomReset"]);
+
+        _menus["View"]->addDivider();
+
+        _actions["View/Frame"] = std::make_shared<dtk::Action>(
+            "Frame View",
+            "ViewFrame",
+            dtk::Key::Backspace,
+            0,
+            [this](bool value)
+            {
+                if (_document)
+                {
+                    _document->getViewModel()->setFrame(value);
+                }
+            });
+        _actions["View/Frame"]->toolTip = "Frame the view";
+        _menus["View"]->addItem(_actions["View/Frame"]);
+    }
+
     void MenuBar::_fileMenuUpdate()
     {
         _menus["File"]->setItemEnabled(_actions["File/Close"], _document.get());
@@ -689,11 +697,11 @@ namespace toucan
         _menus["File"]->setItemEnabled(_actions["File/Prev"], _filesActions.size() > 1);
     }
 
-    void MenuBar::_editMenuUpdate()
+    void MenuBar::_selectMenuUpdate()
     {
-        _menus["Edit"]->setItemEnabled(_actions["Edit/SelectAll"], _document.get());
-        _menus["Edit"]->setItemEnabled(_actions["Edit/SelectNone"], _document.get());
-        _menus["Edit"]->setItemEnabled(_actions["Edit/SelectInvert"], _document.get());
+        _menus["Select"]->setItemEnabled(_actions["Select/All"], _document.get());
+        _menus["Select"]->setItemEnabled(_actions["Select/None"], _document.get());
+        _menus["Select"]->setItemEnabled(_actions["Select/Invert"], _document.get());
     }
 
     void MenuBar::_timeMenuUpdate()
@@ -728,6 +736,10 @@ namespace toucan
         _menus["Playback"]->setItemEnabled(_actions["Playback/Toggle"], _document.get());
     }
 
+    void MenuBar::_windowMenuUpdate()
+    {
+    }
+
     void MenuBar::_viewMenuUpdate()
     {
         if (_document)
@@ -736,7 +748,7 @@ namespace toucan
                 _document->getViewModel()->observeFrame(),
                 [this](bool value)
                 {
-                    _menus["View"]->setItemChecked(_actions["View/FrameView"], value);
+                    _menus["View"]->setItemChecked(_actions["View/Frame"], value);
                 });
         }
         else
@@ -747,10 +759,6 @@ namespace toucan
         _menus["View"]->setItemEnabled(_actions["View/ZoomIn"], _document.get());
         _menus["View"]->setItemEnabled(_actions["View/ZoomOut"], _document.get());
         _menus["View"]->setItemEnabled(_actions["View/ZoomReset"], _document.get());
-        _menus["View"]->setItemEnabled(_actions["View/FrameView"], _document.get());
-    }
-
-    void MenuBar::_windowMenuUpdate()
-    {
+        _menus["View"]->setItemEnabled(_actions["View/Frame"], _document.get());
     }
 }
diff --git a/lib/toucanView/MenuBar.h b/lib/toucanView/MenuBar.h
index 1712844..56ca6f7 100644
--- a/lib/toucanView/MenuBar.h
+++ b/lib/toucanView/MenuBar.h
@@ -41,7 +41,7 @@ namespace toucan
         void _fileMenuInit(
             const std::shared_ptr<dtk::Context>&,
             const std::shared_ptr<App>&);
-        void _editMenuInit(
+        void _selectMenuInit(
             const std::shared_ptr<dtk::Context>&,
             const std::shared_ptr<App>&);
         void _timeMenuInit(
@@ -50,20 +50,20 @@ namespace toucan
         void _playbackMenuInit(
             const std::shared_ptr<dtk::Context>&,
             const std::shared_ptr<App>&);
-        void _viewMenuInit(
-            const std::shared_ptr<dtk::Context>&,
-            const std::shared_ptr<App>&);
         void _windowMenuInit(
             const std::shared_ptr<dtk::Context>&,
             const std::shared_ptr<App>&,
             const std::shared_ptr<Window>&);
+        void _viewMenuInit(
+            const std::shared_ptr<dtk::Context>&,
+            const std::shared_ptr<App>&);
 
         void _fileMenuUpdate();
-        void _editMenuUpdate();
+        void _selectMenuUpdate();
         void _timeMenuUpdate();
         void _playbackMenuUpdate();
-        void _viewMenuUpdate();
         void _windowMenuUpdate();
+        void _viewMenuUpdate();
 
         std::weak_ptr<App> _app;
         std::shared_ptr<DocumentsModel> _documentsModel;
@@ -77,12 +77,12 @@ namespace toucan
         std::shared_ptr<dtk::ValueObserver<std::shared_ptr<Document> > > _documentObserver;
         std::shared_ptr<dtk::ValueObserver<int> > _documentIndexObserver;
         std::shared_ptr<dtk::ValueObserver<Playback> > _playbackObserver;
-        std::shared_ptr<dtk::ValueObserver<bool> > _frameViewObserver;
         std::shared_ptr<dtk::ValueObserver<bool> > _fullScreenObserver;
         std::shared_ptr<dtk::MapObserver<WindowControl, bool> > _controlsObserver;
         std::shared_ptr<dtk::ValueObserver<float> > _displayScaleObserver;
         std::shared_ptr<dtk::ValueObserver<bool> > _tooltipsObserver;
         std::shared_ptr<dtk::ValueObserver<TimeUnits> > _timeUnitsObserver;
+        std::shared_ptr<dtk::ValueObserver<bool> > _frameViewObserver;
     };
 }
 
diff --git a/lib/toucanView/BottomBar.cpp b/lib/toucanView/PlaybackBar.cpp
similarity index 88%
rename from lib/toucanView/BottomBar.cpp
rename to lib/toucanView/PlaybackBar.cpp
index 049d3dc..19662cc 100644
--- a/lib/toucanView/BottomBar.cpp
+++ b/lib/toucanView/PlaybackBar.cpp
@@ -1,18 +1,18 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright Contributors to the toucan project.
 
-#include "BottomBar.h"
+#include "PlaybackBar.h"
 
 #include "App.h"
 
 namespace toucan
 {
-    void BottomBar::_init(
+    void PlaybackBar::_init(
         const std::shared_ptr<dtk::Context>& context,
         const std::shared_ptr<App>& app,
         const std::shared_ptr<dtk::IWidget>& parent)
     {
-        dtk::IWidget::_init(context, "toucan::BottomBar", parent);
+        dtk::IWidget::_init(context, "toucan::PlaybackBar", parent);
 
         _layout = dtk::HorizontalLayout::create(context, shared_from_this());
         _layout->setMarginRole(dtk::SizeRole::MarginInside);
@@ -108,47 +108,47 @@ namespace toucan
             });
     }
 
-    BottomBar::~BottomBar()
+        PlaybackBar::~PlaybackBar()
     {}
 
-    std::shared_ptr<BottomBar> BottomBar::create(
+    std::shared_ptr<PlaybackBar> PlaybackBar::create(
         const std::shared_ptr<dtk::Context>& context,
         const std::shared_ptr<App>& app,
         const std::shared_ptr<dtk::IWidget>& parent)
     {
-        auto out = std::shared_ptr<BottomBar>(new BottomBar);
+        auto out = std::shared_ptr<PlaybackBar>(new PlaybackBar);
         out->_init(context, app, parent);
         return out;
     }
 
-    void BottomBar::setGeometry(const dtk::Box2I& value)
+    void PlaybackBar::setGeometry(const dtk::Box2I& value)
     {
         IWidget::setGeometry(value);
         _layout->setGeometry(value);
     }
 
-    void BottomBar::sizeHintEvent(const dtk::SizeHintEvent& event)
+    void PlaybackBar::sizeHintEvent(const dtk::SizeHintEvent& event)
     {
         IWidget::sizeHintEvent(event);
         _setSizeHint(_layout->getSizeHint());
     }
 
-    void BottomBar::_timelineUpdate()
+    void PlaybackBar::_timelineUpdate()
     {}
 
-    void BottomBar::_timeRangeUpdate()
+    void PlaybackBar::_timeRangeUpdate()
     {
         _timeEdit->setTimeRange(_timeRange);
 
         _durationLabel->setTime(_timeRange.duration());
     }
 
-    void BottomBar::_currentTimeUpdate()
+    void PlaybackBar::_currentTimeUpdate()
     {
         _timeEdit->setTime(_currentTime);
     }
 
-    void BottomBar::_playbackUpdate()
+    void PlaybackBar::_playbackUpdate()
     {
         _playbackButtons->setPlayback(_playback);
     }
diff --git a/lib/toucanView/BottomBar.h b/lib/toucanView/PlaybackBar.h
similarity index 92%
rename from lib/toucanView/BottomBar.h
rename to lib/toucanView/PlaybackBar.h
index d387ee6..8446f5d 100644
--- a/lib/toucanView/BottomBar.h
+++ b/lib/toucanView/PlaybackBar.h
@@ -13,7 +13,7 @@ namespace toucan
     class App;
     class Document;
 
-    class BottomBar : public dtk::IWidget
+    class PlaybackBar : public dtk::IWidget
     {
     protected:
         void _init(
@@ -22,9 +22,9 @@ namespace toucan
             const std::shared_ptr<IWidget>& parent);
 
     public:
-        virtual ~BottomBar();
+        virtual ~PlaybackBar();
 
-        static std::shared_ptr<BottomBar> create(
+        static std::shared_ptr<PlaybackBar> create(
             const std::shared_ptr<dtk::Context>&,
             const std::shared_ptr<App>&,
             const std::shared_ptr<IWidget>& parent = nullptr);
diff --git a/lib/toucanView/ToolBar.cpp b/lib/toucanView/ToolBar.cpp
index 783d26f..26bea6f 100644
--- a/lib/toucanView/ToolBar.cpp
+++ b/lib/toucanView/ToolBar.cpp
@@ -4,6 +4,7 @@
 #include "ToolBar.h"
 
 #include "App.h"
+#include "ViewModel.h"
 
 #include <dtk/ui/Divider.h>
 
@@ -21,7 +22,7 @@ namespace toucan
         _layout = dtk::HorizontalLayout::create(context, shared_from_this());
         _layout->setSpacingRole(dtk::SizeRole::SpacingTool);
 
-        const std::vector<std::string> actionNames =
+        std::vector<std::string> actionNames =
         {
             "File/Open",
             "File/Close",
@@ -61,6 +62,48 @@ namespace toucan
             });
         _buttons["Window/FullScreen"] = button;
 
+        dtk::Divider::create(context, dtk::Orientation::Horizontal, _layout);
+        
+        actionNames =
+        {
+            "View/ZoomIn",
+            "View/ZoomOut",
+            "View/ZoomReset"
+        };
+        for (const auto& name : actionNames)
+        {
+            i = actions.find(name);
+            button = dtk::ToolButton::create(context, _layout);
+            button->setIcon(i->second->icon);
+            button->setTooltip(i->second->toolTip);
+            button->setClickedCallback(
+                [i]
+                {
+                    if (i->second->callback)
+                    {
+                        i->second->callback();
+                    }
+                });
+            _buttons[name] = button;
+        }
+        
+        i = actions.find("View/Frame");
+        button = dtk::ToolButton::create(context, _layout);
+        button->setIcon(i->second->icon);
+        button->setCheckable(true);
+        button->setTooltip(i->second->toolTip);
+        button->setCheckedCallback(
+            [i](bool value)
+            {
+                if (i->second->checkedCallback)
+                {
+                    i->second->checkedCallback(value);
+                }
+            });
+        _buttons["View/Frame"] = button;
+
+        dtk::Divider::create(context, dtk::Orientation::Horizontal, _layout);
+
         _widgetUpdate();
 
         _documentsObserver = dtk::ListObserver<std::shared_ptr<Document> >::create(
@@ -71,6 +114,14 @@ namespace toucan
                 _widgetUpdate();
             });
 
+        _documentObserver = dtk::ValueObserver<std::shared_ptr<Document> >::create(
+            app->getDocumentsModel()->observeCurrent(),
+            [this](const std::shared_ptr<Document>& document)
+            {
+                _document = document;
+                _widgetUpdate();
+            });
+
         _fullScreenObserver = dtk::ValueObserver<bool>::create(
             window->observeFullScreen(),
             [this](bool value)
@@ -110,5 +161,19 @@ namespace toucan
     {
         _buttons["File/Close"]->setEnabled(_documentsSize > 0);
         _buttons["File/CloseAll"]->setEnabled(_documentsSize > 0);
+
+        if (_document)
+        {
+            _frameViewObserver = dtk::ValueObserver<bool>::create(
+                _document->getViewModel()->observeFrame(),
+                [this](bool value)
+                {
+                    _buttons["View/Frame"]->setChecked(value);
+                });
+        }
+        else
+        {
+            _frameViewObserver.reset();
+        }
     }
 }
diff --git a/lib/toucanView/ToolBar.h b/lib/toucanView/ToolBar.h
index 0254de4..6dc6cff 100644
--- a/lib/toucanView/ToolBar.h
+++ b/lib/toucanView/ToolBar.h
@@ -42,12 +42,15 @@ namespace toucan
         void _widgetUpdate();
 
         size_t _documentsSize = 0;
+        std::shared_ptr<Document> _document;
 
         std::shared_ptr<dtk::HorizontalLayout> _layout;
         std::map<std::string, std::shared_ptr<dtk::ToolButton> > _buttons;
 
         std::shared_ptr<dtk::ListObserver<std::shared_ptr<Document> > > _documentsObserver;
+        std::shared_ptr<dtk::ValueObserver<std::shared_ptr<Document> > > _documentObserver;
         std::shared_ptr<dtk::ValueObserver<bool> > _fullScreenObserver;
+        std::shared_ptr<dtk::ValueObserver<bool> > _frameViewObserver;
     };
 }
 
diff --git a/lib/toucanView/Window.cpp b/lib/toucanView/Window.cpp
index 8a83841..6ab13ff 100644
--- a/lib/toucanView/Window.cpp
+++ b/lib/toucanView/Window.cpp
@@ -4,12 +4,12 @@
 #include "Window.h"
 
 #include "App.h"
-#include "BottomBar.h"
 #include "DocumentTab.h"
 #include "ExportTool.h"
 #include "GraphTool.h"
-#include "InspectorTool.h"
+#include "JSONTool.h"
 #include "MenuBar.h"
+#include "PlaybackBar.h"
 #include "TimelineWidget.h"
 #include "ToolBar.h"
 
@@ -59,7 +59,7 @@ namespace toucan
         _tabWidget->setVStretch(dtk::Stretch::Expanding);
 
         _toolWidget = dtk::TabWidget::create(context, _hSplitter);
-        _toolWidgets.push_back(InspectorTool::create(context, app));
+        _toolWidgets.push_back(JSONTool::create(context, app));
         _toolWidgets.push_back(GraphTool::create(context, app));
         _toolWidgets.push_back(ExportTool::create(context, app));
         for (const auto& toolWidget : _toolWidgets)
@@ -69,7 +69,7 @@ namespace toucan
 
         _bottomLayout = dtk::VerticalLayout::create(context, _vSplitter);
         _bottomLayout->setSpacingRole(dtk::SizeRole::None);
-        _bottomBar = BottomBar::create(context, app, _bottomLayout);
+        _playbackBar = PlaybackBar::create(context, app, _bottomLayout);
         _timelineWidget = TimelineWidget::create(context, app, _bottomLayout);
         _timelineWidget->setVStretch(dtk::Stretch::Expanding);
 
@@ -148,8 +148,8 @@ namespace toucan
                 _toolBarDivider->setVisible(i->second);
                 i = value.find(WindowControl::TimelineWidget);
                 _timelineWidget->setVisible(i->second);
-                auto j = value.find(WindowControl::BottomBar);
-                _bottomBar->setVisible(j->second);
+                auto j = value.find(WindowControl::PlaybackBar);
+                _playbackBar->setVisible(j->second);
                 _bottomLayout->setVisible(i->second || j->second);
                 i = value.find(WindowControl::Tools);
                 _toolWidget->setVisible(i->second);
diff --git a/lib/toucanView/Window.h b/lib/toucanView/Window.h
index f5acd5d..e4a1595 100644
--- a/lib/toucanView/Window.h
+++ b/lib/toucanView/Window.h
@@ -15,11 +15,11 @@
 namespace toucan
 {
     class App;
-    class BottomBar;
     class Document;
     class DocumentTab;
     class IToolWidget;
     class MenuBar;
+    class PlaybackBar;
     class TimelineWidget;
     class ToolBar;
 
@@ -64,7 +64,7 @@ namespace toucan
         std::shared_ptr<dtk::TabWidget> _toolWidget;
         std::vector<std::shared_ptr<IToolWidget> > _toolWidgets;
         std::shared_ptr<dtk::VerticalLayout> _bottomLayout;
-        std::shared_ptr<BottomBar> _bottomBar;
+        std::shared_ptr<PlaybackBar> _playbackBar;
         std::shared_ptr<TimelineWidget> _timelineWidget;
 
         std::shared_ptr<dtk::ListObserver<std::shared_ptr<Document> > > _documentsObserver;
diff --git a/lib/toucanView/WindowModel.cpp b/lib/toucanView/WindowModel.cpp
index 9df240e..f04d1c1 100644
--- a/lib/toucanView/WindowModel.cpp
+++ b/lib/toucanView/WindowModel.cpp
@@ -10,7 +10,7 @@ namespace toucan
         std::map<WindowControl, bool> values =
         {
             { WindowControl::ToolBar, true },
-            { WindowControl::BottomBar, true },
+            { WindowControl::PlaybackBar, true },
             { WindowControl::TimelineWidget, true },
             { WindowControl::Tools, true }
         };
diff --git a/lib/toucanView/WindowModel.h b/lib/toucanView/WindowModel.h
index 84ffa9e..9ee6d72 100644
--- a/lib/toucanView/WindowModel.h
+++ b/lib/toucanView/WindowModel.h
@@ -11,7 +11,7 @@ namespace toucan
     enum class WindowControl
     {
         ToolBar,
-        BottomBar,
+        PlaybackBar,
         TimelineWidget,
         Tools
     };