diff --git a/stuff/profiles/layouts/rooms/Default/room1.ini b/stuff/profiles/layouts/rooms/Default/room1.ini
index 8abbfaa..aec7553 100644
--- a/stuff/profiles/layouts/rooms/Default/room1.ini
+++ b/stuff/profiles/layouts/rooms/Default/room1.ini
@@ -5,7 +5,7 @@ pane_1\name=FilmStrip
 pane_1\geometry=@Rect(1168 34 342 514)
 pane_2\name=LevelPalette
 pane_2\geometry=@Rect(421 706 739 290)
-pane_2\viewtype=0
+pane_2\viewtype=2
 pane_3\name=StyleEditor
 pane_3\geometry=@Rect(1168 556 342 440)
 pane_4\name=SceneViewer
diff --git a/stuff/profiles/layouts/rooms/Default/room3.ini b/stuff/profiles/layouts/rooms/Default/room3.ini
index 93fd5b2..7d56a5a 100644
--- a/stuff/profiles/layouts/rooms/Default/room3.ini
+++ b/stuff/profiles/layouts/rooms/Default/room3.ini
@@ -9,7 +9,7 @@ pane_3\name=ToolOptions
 pane_3\geometry=@Rect(0 0 1920 26)
 pane_4\name=LevelPalette
 pane_4\geometry=@Rect(1131 34 398 217)
-pane_4\viewtype=0
+pane_4\viewtype=2
 pane_5\name=StyleEditor
 pane_5\geometry=@Rect(1131 259 398 737)
 hierarchy="-1 1 [ 3 [ 1 0 [ 4 5 ] 2 ] ] "
diff --git a/stuff/profiles/layouts/rooms/Default/room5.ini b/stuff/profiles/layouts/rooms/Default/room5.ini
index 2b25991..d21f88d 100644
--- a/stuff/profiles/layouts/rooms/Default/room5.ini
+++ b/stuff/profiles/layouts/rooms/Default/room5.ini
@@ -11,7 +11,7 @@ pane_4\name=Xsheet
 pane_4\geometry=@Rect(43 646 1181 350)
 pane_5\name=LevelPalette
 pane_5\geometry=@Rect(1232 320 688 130)
-pane_5\viewtype=0
+pane_5\viewtype=2
 pane_6\name=StyleEditor
 pane_6\geometry=@Rect(1232 458 688 538)
 pane_7\name=StudioPalette
diff --git a/stuff/profiles/layouts/rooms/Default/room9.ini b/stuff/profiles/layouts/rooms/Default/room9.ini
index 9f9cd43..a1bf55f 100644
--- a/stuff/profiles/layouts/rooms/Default/room9.ini
+++ b/stuff/profiles/layouts/rooms/Default/room9.ini
@@ -20,4 +20,4 @@ pane_5\name=ToolOptions
 pane_5\geometry=@Rect(0 0 1920 26)
 pane_6\name=LevelPalette
 pane_6\geometry=@Rect(0 521 238 190)
-pane_6\viewtype=0
+pane_6\viewtype=2
diff --git a/toonz/sources/include/tcommon.h b/toonz/sources/include/tcommon.h
index 8a4e1f8..a5dec3d 100644
--- a/toonz/sources/include/tcommon.h
+++ b/toonz/sources/include/tcommon.h
@@ -176,7 +176,6 @@ inline std::ostream &operator<<(std::ostream &out, const std::string &s) {
 
 #define tArrayCount(ARRAY) (sizeof(ARRAY) / sizeof(ARRAY[0]))
 
-const std::string mySettingsFileName              = "mysettings.ini";
 const std::string styleNameEasyInputWordsFileName = "stylename_easyinput.ini";
 
 #endif  //__T_COMMON_INCLUDED
diff --git a/toonz/sources/include/toonzqt/paletteviewergui.h b/toonz/sources/include/toonzqt/paletteviewergui.h
index e853458..5e03c6d 100644
--- a/toonz/sources/include/toonzqt/paletteviewergui.h
+++ b/toonz/sources/include/toonzqt/paletteviewergui.h
@@ -50,22 +50,6 @@ class StyleNameEditor;
 
 namespace PaletteViewerGUI {
 
-// class for managing the palette's default style chip size
-class DVAPI ChipSizeManager {
-public:
-  int chipSize_Palette;
-  int chipSize_Cleanup;
-  int chipSize_Studio;
-  static ChipSizeManager *instance() {
-    static ChipSizeManager _instance;
-    return &_instance;
-  }
-
-private:
-  ChipSizeManager()
-      : chipSize_Palette(2), chipSize_Cleanup(2), chipSize_Studio(2) {}
-};
-
 enum PaletteViewType  //! Possible palette contents of a Palette Viewer.
 { LEVEL_PALETTE,      //!< Content palette is from a level.
   CLEANUP_PALETTE,    //!< Content palette is from cleanup settings.
diff --git a/toonz/sources/include/toonzqt/studiopaletteviewer.h b/toonz/sources/include/toonzqt/studiopaletteviewer.h
index 14460d5..c8fdf64 100644
--- a/toonz/sources/include/toonzqt/studiopaletteviewer.h
+++ b/toonz/sources/include/toonzqt/studiopaletteviewer.h
@@ -26,7 +26,7 @@ class TFrameHandle;
 class PalettesScanPopup;
 class TXsheetHandle;
 class TXshLevelHandle;
-
+class PaletteViewer;
 //=============================================================================
 //!	The StudioPaletteTreeViewer class provides an object to view and manage
 //! palettes files.
@@ -207,6 +207,7 @@ class DVAPI StudioPaletteViewer final : public QSplitter {
   Q_OBJECT
 
   StudioPaletteTreeViewer *m_studioPaletteTreeViewer;
+  PaletteViewer *m_studioPaletteViewer;
 
 public:
   StudioPaletteViewer(QWidget *parent, TPaletteHandle *studioPaletteHandle,
@@ -217,6 +218,9 @@ public:
 
   /*! In order to save current palette from the tool button in the PageViewer.*/
   TFilePath getCurrentItemPath();
+
+  int getViewMode() const;
+  void setViewMode(int mode);
 };
 
 #endif  // STUDIOPALETTEVIEWER_H
diff --git a/toonz/sources/toonz/comboviewerpane.cpp b/toonz/sources/toonz/comboviewerpane.cpp
index 72ecb7f..f0c4a5d 100644
--- a/toonz/sources/toonz/comboviewerpane.cpp
+++ b/toonz/sources/toonz/comboviewerpane.cpp
@@ -85,12 +85,11 @@ ComboViewerPanel::ComboViewerPanel(QWidget *parent, Qt::WindowFlags flags)
 #else
 ComboViewerPanel::ComboViewerPanel(QWidget *parent, Qt::WFlags flags)
 #endif
-    : StyleShortcutSwitchablePanel(parent) {
+    : QFrame(parent) {
   TApp *app = TApp::instance();
 
-  QFrame *hbox = new QFrame(this);
-  hbox->setFrameStyle(QFrame::StyledPanel);
-  hbox->setObjectName("ComboViewerPanel");
+  setFrameStyle(QFrame::StyledPanel);
+  setObjectName("ComboViewerPanel");
 
   // ToolBar
   m_toolbar = new Toolbar(this, false);
@@ -151,8 +150,7 @@ ComboViewerPanel::ComboViewerPanel(QWidget *parent, Qt::WFlags flags)
         new FlipConsole(mainLayout, buttons, false, m_keyFrameButton,
                         "SceneViewerConsole", this, true);
   }
-  hbox->setLayout(mainLayout);
-  setWidget(hbox);
+  setLayout(mainLayout);
 
   m_flipConsole->enableButton(FlipConsole::eMatte, false, false);
   m_flipConsole->enableButton(FlipConsole::eSave, false, false);
@@ -192,22 +190,17 @@ ComboViewerPanel::ComboViewerPanel(QWidget *parent, Qt::WFlags flags)
                        SLOT(update()));
   ret = ret && connect(app->getCurrentScene(), SIGNAL(sceneSwitched()), this,
                        SLOT(onSceneSwitched()));
-  ret = ret && connect(m_toolOptions, SIGNAL(newPanelCreated()), this,
-                       SLOT(updateTabFocus()));
 
   assert(ret);
 
   m_flipConsole->setChecked(FlipConsole::eSound, true);
   m_playSound = m_flipConsole->isChecked(FlipConsole::eSound);
 
-  // note: initializeTitleBar() refers to m_sceneViewer
-  initializeTitleBar(getTitleBar());
-
   // initial state of the parts
-  m_visibleFlag[CVPARTS_TOOLBAR]     = true;
-  m_visibleFlag[CVPARTS_TOOLOPTIONS] = true;
-  m_visibleFlag[CVPARTS_FLIPCONSOLE] = true;
+  m_visiblePartsFlag = CVPARTS_ALL;
   updateShowHide();
+
+  setFocusProxy(m_sceneViewer);
 }
 
 //-----------------------------------------------------------------------------
@@ -216,11 +209,11 @@ ComboViewerPanel::ComboViewerPanel(QWidget *parent, Qt::WFlags flags)
 
 void ComboViewerPanel::updateShowHide() {
   // toolbar
-  m_toolbar->setVisible(m_visibleFlag[CVPARTS_TOOLBAR]);
+  m_toolbar->setVisible(m_visiblePartsFlag & CVPARTS_TOOLBAR);
   // tool options bar
-  m_toolOptions->setVisible(m_visibleFlag[CVPARTS_TOOLOPTIONS]);
+  m_toolOptions->setVisible(m_visiblePartsFlag & CVPARTS_TOOLOPTIONS);
   // flip console
-  m_flipConsole->showHideAllParts(m_visibleFlag[CVPARTS_FLIPCONSOLE]);
+  m_flipConsole->showHideAllParts(m_visiblePartsFlag & CVPARTS_FLIPCONSOLE);
   update();
 }
 
@@ -244,16 +237,16 @@ void ComboViewerPanel::addShowHideContextMenu(QMenu *menu) {
   QAction *flipConsoleSHAct = showHideMenu->addAction(tr("Console"));
 
   toolbarSHAct->setCheckable(true);
-  toolbarSHAct->setChecked(m_visibleFlag[CVPARTS_TOOLBAR]);
-  toolbarSHAct->setData((int)CVPARTS_TOOLBAR);
+  toolbarSHAct->setChecked(m_visiblePartsFlag & CVPARTS_TOOLBAR);
+  toolbarSHAct->setData((UINT)CVPARTS_TOOLBAR);
 
   toolOptionsSHAct->setCheckable(true);
-  toolOptionsSHAct->setChecked(m_visibleFlag[CVPARTS_TOOLOPTIONS]);
-  toolOptionsSHAct->setData((int)CVPARTS_TOOLOPTIONS);
+  toolOptionsSHAct->setChecked(m_visiblePartsFlag & CVPARTS_TOOLOPTIONS);
+  toolOptionsSHAct->setData((UINT)CVPARTS_TOOLOPTIONS);
 
   flipConsoleSHAct->setCheckable(true);
-  flipConsoleSHAct->setChecked(m_visibleFlag[CVPARTS_FLIPCONSOLE]);
-  flipConsoleSHAct->setData((int)CVPARTS_FLIPCONSOLE);
+  flipConsoleSHAct->setChecked(m_visiblePartsFlag & CVPARTS_FLIPCONSOLE);
+  flipConsoleSHAct->setData((UINT)CVPARTS_FLIPCONSOLE);
 
   QActionGroup *showHideActGroup = new QActionGroup(this);
   showHideActGroup->setExclusive(false);
@@ -280,13 +273,10 @@ void ComboViewerPanel::addShowHideContextMenu(QMenu *menu) {
 */
 
 void ComboViewerPanel::onShowHideActionTriggered(QAction *act) {
-  CV_Parts parts = (CV_Parts)act->data().toInt();
-  assert(parts < CVPARTS_COUNT);
+  CV_Parts part = (CV_Parts)act->data().toUInt();
+  assert(part < CVPARTS_End);
 
-  if (m_visibleFlag[parts])
-    m_visibleFlag[parts] = false;
-  else
-    m_visibleFlag[parts] = true;
+  m_visiblePartsFlag ^= part;
 
   updateShowHide();
 }
@@ -335,15 +325,11 @@ void ComboViewerPanel::onDrawFrame(
 
 //-----------------------------------------------------------------------------
 
-ComboViewerPanel::~ComboViewerPanel() {
-  if (TApp::instance()->getInknPaintViewerPanel() == this)
-    TApp::instance()->setInknPaintViewerPanel(0);
-}
+ComboViewerPanel::~ComboViewerPanel() {}
 
 //-----------------------------------------------------------------------------
 
 void ComboViewerPanel::showEvent(QShowEvent *event) {
-  StyleShortcutSwitchablePanel::showEvent(event);
   TApp *app                    = TApp::instance();
   TFrameHandle *frameHandle    = app->getCurrentFrame();
   TSceneHandle *sceneHandle    = app->getCurrentScene();
@@ -373,6 +359,10 @@ void ComboViewerPanel::showEvent(QShowEvent *event) {
   */
   ret = ret && connect(sceneHandle, SIGNAL(nameSceneChanged()), this,
                        SLOT(changeWindowTitle()));
+  ret =
+      ret && connect(sceneHandle, SIGNAL(preferenceChanged(const QString &)),
+                     m_flipConsole, SLOT(onPreferenceChanged(const QString &)));
+
   ret = ret && connect(levelHandle, SIGNAL(xshLevelChanged()), this,
                        SLOT(changeWindowTitle()));
   ret = ret && connect(frameHandle, SIGNAL(frameSwitched()), this,
@@ -400,6 +390,7 @@ void ComboViewerPanel::showEvent(QShowEvent *event) {
   assert(ret);
 
   m_flipConsole->setActive(true);
+  m_flipConsole->onPreferenceChanged("");
 
   // refresh
   onSceneChanged();
@@ -409,7 +400,6 @@ void ComboViewerPanel::showEvent(QShowEvent *event) {
 //-----------------------------------------------------------------------------
 
 void ComboViewerPanel::hideEvent(QHideEvent *event) {
-  StyleShortcutSwitchablePanel::hideEvent(event);
   TApp *app = TApp::instance();
   disconnect(app->getCurrentFrame(), 0, this, 0);
   disconnect(app->getCurrentScene(), 0, this, 0);
@@ -419,6 +409,8 @@ void ComboViewerPanel::hideEvent(QHideEvent *event) {
 
   disconnect(app->getCurrentTool(), SIGNAL(toolSwitched()), m_sceneViewer,
              SLOT(onToolSwitched()));
+  disconnect(app->getCurrentScene(), SIGNAL(preferenceChanged(const QString &)),
+             m_flipConsole, SLOT(onPreferenceChanged(const QString &)));
 
   m_flipConsole->setActive(false);
 }
@@ -436,9 +428,9 @@ void ComboViewerPanel::initializeTitleBar(TPanelTitleBar *titleBar) {
 
   // buttons for show / hide toggle for the field guide and the safe area
   TPanelTitleBarButtonForSafeArea *safeAreaButton =
-      new TPanelTitleBarButtonForSafeArea(titleBar, ":Resources/pane_safe_off.svg",
-                                          ":Resources/pane_safe_over.svg",
-                                          ":Resources/pane_safe_on.svg");
+      new TPanelTitleBarButtonForSafeArea(
+          titleBar, ":Resources/pane_safe_off.svg",
+          ":Resources/pane_safe_over.svg", ":Resources/pane_safe_on.svg");
   safeAreaButton->setToolTip(tr("Safe Area (Right Click to Select)"));
   titleBar->add(QPoint(x, 0), safeAreaButton);
   ret = ret && connect(safeAreaButton, SIGNAL(toggled(bool)),
@@ -507,8 +499,8 @@ void ComboViewerPanel::initializeTitleBar(TPanelTitleBar *titleBar) {
 
   // preview toggles
   m_previewButton = new TPanelTitleBarButton(
-      titleBar, ":Resources/pane_preview_off.svg", ":Resources/pane_preview_over.svg",
-      ":Resources/pane_preview_on.svg");
+      titleBar, ":Resources/pane_preview_off.svg",
+      ":Resources/pane_preview_over.svg", ":Resources/pane_preview_on.svg");
   x += 10 + iconWidth;
   titleBar->add(QPoint(x, 0), m_previewButton);
   m_previewButton->setToolTip(tr("Preview"));
@@ -616,6 +608,7 @@ void ComboViewerPanel::changeWindowTitle() {
   TApp *app         = TApp::instance();
   ToonzScene *scene = app->getCurrentScene()->getScene();
   if (!scene) return;
+  if (!parentWidget()) return;
   int frame = app->getCurrentFrame()->getFrame();
 
   // put the titlebar texts in this string
@@ -637,7 +630,7 @@ void ComboViewerPanel::changeWindowTitle() {
           !m_sceneViewer->is3DView()) {
         name = name + tr(" (Flipped)");
       }
-      setWindowTitle(name);
+      parentWidget()->setWindowTitle(name);
       return;
     }
     TXsheet *xsh  = app->getCurrentXsheet()->getXsheet();
@@ -647,7 +640,7 @@ void ComboViewerPanel::changeWindowTitle() {
           !m_sceneViewer->is3DView()) {
         name = name + tr(" (Flipped)");
       }
-      setWindowTitle(name);
+      parentWidget()->setWindowTitle(name);
       return;
     }
     assert(cell.m_level.getPointer());
@@ -676,7 +669,7 @@ void ComboViewerPanel::changeWindowTitle() {
              &&
              !CameraTestCheck::instance()  // camera test mode must be OFF
                                            // neither
-                                               ->isEnabled() &&
+                  ->isEnabled() &&
              !m_sceneViewer->is3DView()) {
       TAffine aff                             = m_sceneViewer->getViewMatrix();
       if (m_sceneViewer->getIsFlippedX()) aff = aff * TScale(-1, 1);
@@ -712,7 +705,7 @@ void ComboViewerPanel::changeWindowTitle() {
       !m_sceneViewer->is3DView()) {
     name = name + tr(" (Flipped)");
   }
-  setWindowTitle(name);
+  parentWidget()->setWindowTitle(name);
 }
 
 //-----------------------------------------------------------------------------
@@ -821,13 +814,6 @@ void ComboViewerPanel::onFrameTypeChanged() {
 
 //-----------------------------------------------------------------------------
 
-void ComboViewerPanel::onPreferenceChanged(const QString &prefName) {
-  m_flipConsole->onPreferenceChanged(prefName);
-  StyleShortcutSwitchablePanel::onPreferenceChanged(prefName);
-}
-
-//-----------------------------------------------------------------------------
-
 void ComboViewerPanel::playAudioFrame(int frame) {
   if (m_first) {
     m_first = false;
@@ -860,8 +846,8 @@ bool ComboViewerPanel::hasSoundtrack() {
   }
   TXsheetHandle *xsheetHandle    = TApp::instance()->getCurrentXsheet();
   TXsheet::SoundProperties *prop = new TXsheet::SoundProperties();
-  if(!m_sceneViewer->isPreviewEnabled()) prop->m_isPreview = true;
-  m_sound                        = xsheetHandle->getXsheet()->makeSound(prop);
+  if (!m_sceneViewer->isPreviewEnabled()) prop->m_isPreview = true;
+  m_sound = xsheetHandle->getXsheet()->makeSound(prop);
   if (m_sound == NULL) {
     m_hasSoundtrack = false;
     return false;
@@ -875,4 +861,21 @@ void ComboViewerPanel::onButtonPressed(FlipConsole::EGadget button) {
   if (button == FlipConsole::eSound) {
     m_playSound = !m_playSound;
   }
+}
+
+//-----------------------------------------------------------------------------
+
+void ComboViewerPanel::setVisiblePartsFlag(UINT flag) {
+  m_visiblePartsFlag = flag;
+  updateShowHide();
+}
+
+// SaveLoadQSettings
+void ComboViewerPanel::save(QSettings &settings) const {
+  settings.setValue("visibleParts", m_visiblePartsFlag);
+}
+
+void ComboViewerPanel::load(QSettings &settings) {
+  m_visiblePartsFlag = settings.value("visibleParts", CVPARTS_ALL).toUInt();
+  updateShowHide();
 }
\ No newline at end of file
diff --git a/toonz/sources/toonz/comboviewerpane.h b/toonz/sources/toonz/comboviewerpane.h
index b12bef6..614e8f6 100644
--- a/toonz/sources/toonz/comboviewerpane.h
+++ b/toonz/sources/toonz/comboviewerpane.h
@@ -3,12 +3,14 @@
 #ifndef COMBOVIEWER_PANE_INCLUDED
 #define COMBOVIEWER_PANE_INCLUDED
 
-#include "styleshortcutswitchablepanel.h"
 #include "sceneviewer.h"
 #include "toonzqt/intfield.h"
 #include "toonzqt/keyframenavigator.h"
 
 #include "toonzqt/flipconsoleowner.h"
+#include "saveloadqsettings.h"
+
+#include <QFrame>
 
 class QPoint;
 class QToolBar;
@@ -30,15 +32,19 @@ class ToolOptions;
 // ComboViewerPanel
 //-----------------------------------------------------------------------------
 enum CV_Parts {
-  CVPARTS_TOOLBAR = 0,
-  CVPARTS_TOOLOPTIONS,
-  CVPARTS_FLIPCONSOLE,
-  CVPARTS_COUNT
+  CVPARTS_None        = 0,
+  CVPARTS_TOOLBAR     = 0x1,
+  CVPARTS_TOOLOPTIONS = 0x2,
+  CVPARTS_FLIPCONSOLE = 0x4,
+  CVPARTS_End         = 0x8,
+  CVPARTS_ALL = CVPARTS_TOOLBAR | CVPARTS_TOOLOPTIONS | CVPARTS_FLIPCONSOLE
 };
+
 //-----------------------------------------------------------------------------
 
-class ComboViewerPanel final : public StyleShortcutSwitchablePanel,
-                               public FlipConsoleOwner {
+class ComboViewerPanel final : public QFrame,
+                               public FlipConsoleOwner,
+                               public SaveLoadQSettings {
   Q_OBJECT
 
   SceneViewer *m_sceneViewer;
@@ -50,7 +56,7 @@ class ComboViewerPanel final : public StyleShortcutSwitchablePanel,
   ToolOptions *m_toolOptions;
   Ruler *m_vRuler;
   Ruler *m_hRuler;
-  bool m_visibleFlag[CVPARTS_COUNT];
+  UINT m_visiblePartsFlag;
   bool m_onionSkinActive = false;
   bool m_playSound       = true;
   bool m_hasSoundtrack   = false;
@@ -73,37 +79,36 @@ public:
   ~ComboViewerPanel();
 
   SceneViewer *getSceneViewer() { return m_sceneViewer; }
+  ToolOptions *getToolOptions() { return m_toolOptions; }
 
-  // toggle show/hide of the widgets according to m_visibleFlag
+  // toggle show/hide of the widgets according to m_visiblePartsFlag
+  void setVisiblePartsFlag(UINT flag);
   void updateShowHide();
   void addShowHideContextMenu(QMenu *);
-  void setShowHideFlag(CV_Parts parts, bool visible) {
-    m_visibleFlag[parts] = visible;
-  }
-  bool getShowHideFlag(CV_Parts parts) { return m_visibleFlag[parts]; }
-  // reimplementation of TPanel::widgetInThisPanelIsFocused
-  bool widgetInThisPanelIsFocused() override {
-    return m_sceneViewer->hasFocus();
-  }
 
   void onDrawFrame(int frame,
                    const ImagePainter::VisualSettings &settings) override;
 
+  void onEnterPanel() {
+    m_sceneViewer->setFocus(Qt::OtherFocusReason);
+    // activate shortcut key for this flipconsole
+    m_flipConsole->makeCurrent();
+  }
+  void onLeavePanel() { m_sceneViewer->clearFocus(); }
+
+  // SaveLoadQSettings
+  virtual void save(QSettings &settings) const override;
+  virtual void load(QSettings &settings) override;
+
+  void initializeTitleBar(TPanelTitleBar *titleBar);
+
 protected:
   void showEvent(QShowEvent *) override;
   void hideEvent(QHideEvent *) override;
-  void initializeTitleBar(TPanelTitleBar *titleBar);
   void createFrameToolBar();
   void createPlayToolBar();
   void addColorMaskButton(QWidget *parent, const char *iconSVGName, int id);
   void contextMenuEvent(QContextMenuEvent *event) override;
-  // reimplementation of TPanel::widgetFocusOnEnter
-  void widgetFocusOnEnter() override {
-    m_sceneViewer->setFocus(Qt::OtherFocusReason);
-    // activate shortcut key for this flipconsole
-    m_flipConsole->makeCurrent();
-  };
-  void widgetClearFocusOnLeave() override { m_sceneViewer->clearFocus(); };
   void playAudioFrame(int frame);
   bool hasSoundtrack();
 
@@ -127,8 +132,6 @@ protected slots:
   void onSceneSwitched();
   void enableFullPreview(bool enabled);
   void enableSubCameraPreview(bool enabled);
-
-  void onPreferenceChanged(const QString &prefName) override;
 };
 
 #endif
diff --git a/toonz/sources/toonz/filmstrip.cpp b/toonz/sources/toonz/filmstrip.cpp
index 7081364..301b8c5 100644
--- a/toonz/sources/toonz/filmstrip.cpp
+++ b/toonz/sources/toonz/filmstrip.cpp
@@ -112,7 +112,6 @@ FilmstripFrames::FilmstripFrames(QScrollArea *parent, Qt::WFlags flags)
     , m_dragSelectionStartIndex(-1)
     , m_dragSelectionEndIndex(-1)
     , m_timerId(0)
-    , m_isGhibli(false)
     , m_selecting(false)
     , m_dragDropArmed(false)
     , m_readOnly(false) {
@@ -132,10 +131,7 @@ FilmstripFrames::FilmstripFrames(QScrollArea *parent, Qt::WFlags flags)
   m_selection->setView(this);
   setMouseTracking(true);
 
-  std::string room =
-      Preferences::instance()->getCurrentRoomChoice().toStdString();
-  m_isGhibli = room == "StudioGhibli";
-  m_viewer   = NULL;
+  m_viewer = NULL;
 }
 
 //-----------------------------------------------------------------------------
@@ -357,26 +353,33 @@ void FilmstripFrames::showEvent(QShowEvent *) {
 
   // cambiamenti al livello
   TXshLevelHandle *levelHandle = app->getCurrentLevel();
-  connect(levelHandle, SIGNAL(xshLevelSwitched(TXshLevel *)), this,
-          SLOT(onLevelSwitched(TXshLevel *)));
-  connect(levelHandle, SIGNAL(xshLevelChanged()), this, SLOT(onLevelChanged()));
-  connect(levelHandle, SIGNAL(xshLevelViewChanged()), this,
-          SLOT(onLevelChanged()));
+  bool ret                     = true;
+  ret = ret && connect(levelHandle, SIGNAL(xshLevelSwitched(TXshLevel *)), this,
+                       SLOT(onLevelSwitched(TXshLevel *)));
+  ret = ret && connect(levelHandle, SIGNAL(xshLevelChanged()), this,
+                       SLOT(onLevelChanged()));
+  ret = ret && connect(levelHandle, SIGNAL(xshLevelViewChanged()), this,
+                       SLOT(onLevelChanged()));
 
   // al frame corrente
-  connect(app->getCurrentFrame(), SIGNAL(frameSwitched()), this,
-          SLOT(onFrameSwitched()));
-  connect(app->getCurrentFrame(), SIGNAL(frameTypeChanged()), this,
-          SLOT(update()));
+  ret = ret && connect(app->getCurrentFrame(), SIGNAL(frameSwitched()), this,
+                       SLOT(onFrameSwitched()));
+  ret = ret && connect(app->getCurrentFrame(), SIGNAL(frameTypeChanged()), this,
+                       SLOT(update()));
 
   // iconcine
-  connect(IconGenerator::instance(), SIGNAL(iconGenerated()), this,
-          SLOT(update()));
+  ret = ret && connect(IconGenerator::instance(), SIGNAL(iconGenerated()), this,
+                       SLOT(update()));
 
   // onion skin
-  connect(app->getCurrentOnionSkin(), SIGNAL(onionSkinMaskChanged()), this,
-          SLOT(update()));
+  ret = ret && connect(app->getCurrentOnionSkin(),
+                       SIGNAL(onionSkinMaskChanged()), this, SLOT(update()));
 
+  // active viewer change
+  ret = ret &&
+        connect(app, SIGNAL(activeViewerChanged()), this, SLOT(getViewer()));
+
+  assert(ret);
   getViewer();
 }
 
@@ -402,9 +405,13 @@ void FilmstripFrames::hideEvent(QHideEvent *) {
   disconnect(app->getCurrentOnionSkin(), SIGNAL(onionSkinMaskChanged()), this,
              SLOT(update()));
 
+  // active viewer change
+  disconnect(app, SIGNAL(activeViewerChanged()), this, SLOT(getViewer()));
+
   if (m_viewer) {
     disconnect(m_viewer, SIGNAL(onZoomChanged()), this, SLOT(update()));
     disconnect(m_viewer, SIGNAL(refreshNavi()), this, SLOT(update()));
+    m_viewer = nullptr;
   }
 }
 
@@ -419,16 +426,13 @@ void FilmstripFrames::getViewer() {
     }
     viewerChanged = true;
   }
-  ComboViewerPanel *inknPaintViewerPanel =
-      TApp::instance()->getInknPaintViewerPanel();
-  if (m_isGhibli && inknPaintViewerPanel) {
-    m_viewer = inknPaintViewerPanel->getSceneViewer();
-  } else {
-    m_viewer = TApp::instance()->getActiveViewer();
-  }
+
+  m_viewer = TApp::instance()->getActiveViewer();
+
   if (m_viewer && viewerChanged) {
     connect(m_viewer, SIGNAL(onZoomChanged()), this, SLOT(update()));
     connect(m_viewer, SIGNAL(refreshNavi()), this, SLOT(update()));
+    update();
   }
 }
 
@@ -738,7 +742,7 @@ void FilmstripFrames::mousePressEvent(QMouseEvent *event) {
     if (fid.getNumber() >= 0 && fid == getCurrentFrameId() &&
         (sl->getType() == TZP_XSHLEVEL || sl->getType() == OVL_XSHLEVEL) &&
         m_viewer && m_viewer->isVisible() && actualIconClicked &&
-        (m_isGhibli != (event->button() == Qt::MiddleButton))) {
+        event->button() == Qt::MiddleButton) {
       m_isNavigatorPanning = true;
       execNavigatorPan(event->pos());
       QApplication::setOverrideCursor(Qt::ClosedHandCursor);
diff --git a/toonz/sources/toonz/filmstrip.h b/toonz/sources/toonz/filmstrip.h
index 469e12e..e72d5a4 100644
--- a/toonz/sources/toonz/filmstrip.h
+++ b/toonz/sources/toonz/filmstrip.h
@@ -131,7 +131,6 @@ protected:
   void stopAutoPanning();
   void timerEvent(QTimerEvent *) override;
   TFrameId getCurrentFrameId();
-  void getViewer();
   void contextMenuEvent(QContextMenuEvent *event) override;
 
   void startDragDrop();
@@ -145,6 +144,7 @@ protected slots:
   void onLevelChanged();
   void onLevelSwitched(TXshLevel *);
   void onFrameSwitched();
+  void getViewer();
 
 private:
   // QSS Properties
@@ -166,7 +166,6 @@ private:
   FilmstripFrameHeadGadget *m_frameHeadGadget;
   InbetweenDialog *m_inbetweenDialog;
   SceneViewer *m_viewer;
-  bool m_isGhibli              = false;
   bool m_justStartedSelection  = false;
   int m_indexForResetSelection = -1;
   bool m_allowResetSelection   = false;
diff --git a/toonz/sources/toonz/mainwindow.cpp b/toonz/sources/toonz/mainwindow.cpp
index d13c141..aecd8af 100644
--- a/toonz/sources/toonz/mainwindow.cpp
+++ b/toonz/sources/toonz/mainwindow.cpp
@@ -348,10 +348,6 @@ void Room::load(const TFilePath &fp) {
       dynamic_cast<FlipBook *>(pane->widget())->setPoolIndex(index);
     }
 
-    /*-- もしRoomにComboViewerがロードされたら、centralWidgetとして登録する --*/
-    if (paneObjectName == "ComboViewer")
-      setCentralViewerPanel(qobject_cast<ComboViewerPanel *>(pane));
-
     settings.endGroup();
   }
 
@@ -549,20 +545,6 @@ void MainWindow::refreshWriteSettings() { writeSettings(); }
 //-----------------------------------------------------------------------------
 
 void MainWindow::readSettings(const QString &argumentLayoutFileName) {
-  TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath(mySettingsFileName));
-  QSettings mySettings(toQString(fp), QSettings::IniFormat);
-  /*-- Palette-PageViewerのチップサイズのロード --*/
-  mySettings.beginGroup("PaletteChipSizes");
-  {
-    PaletteViewerGUI::ChipSizeManager::instance()->chipSize_Palette =
-        mySettings.value("PaletteViewer", 2).toInt();
-    PaletteViewerGUI::ChipSizeManager::instance()->chipSize_Cleanup =
-        mySettings.value("CleanupSettings", 0).toInt();
-    PaletteViewerGUI::ChipSizeManager::instance()->chipSize_Studio =
-        mySettings.value("StudioPalette", 1).toInt();
-  }
-  mySettings.endGroup();
-
   QTabBar *roomTabWidget = m_topBar->getRoomTabWidget();
 
   /*-- Pageを追加すると同時にMenubarを追加する --*/
@@ -656,7 +638,7 @@ void MainWindow::readSettings(const QString &argumentLayoutFileName) {
   writeRoomList(rooms);
 
   // Imposto la stanza corrente
-  fp = ToonzFolder::getRoomsFile(currentRoomFileName);
+  TFilePath fp = ToonzFolder::getRoomsFile(currentRoomFileName);
   Tifstream is(fp);
   std::string currentRoomName;
   is >> currentRoomName;
@@ -673,38 +655,6 @@ void MainWindow::readSettings(const QString &argumentLayoutFileName) {
   }
 
   RecentFiles::instance()->loadRecentFiles();
-
-  QStringList roomNames;
-  roomNames << "InknPaint"
-            << "Cleanup"
-            << "PltEdit"
-            << "Schematic"
-            << "QAR";
-  /*--- ComboViewerのパーツのShow/Hideの再現 ---*/
-  mySettings.beginGroup("ComboViewerPartsVisible");
-  {
-    for (int r = 0; r < roomNames.size(); r++) {
-      QString tmpRoomName = roomNames.at(r);
-      Room *tmpRoom       = getRoomByName(tmpRoomName);
-      if (tmpRoom) {
-        ComboViewerPanel *cvp = tmpRoom->getCentralViewerPanel();
-        if (cvp) {
-          if (r == 0)  // InknPaintRoom
-            TApp::instance()->setInknPaintViewerPanel(cvp);
-          mySettings.beginGroup(tmpRoomName);
-          cvp->setShowHideFlag(CVPARTS_TOOLBAR,
-                               mySettings.value("Toolbar", true).toBool());
-          cvp->setShowHideFlag(CVPARTS_TOOLOPTIONS,
-                               mySettings.value("ToolOptions", true).toBool());
-          cvp->setShowHideFlag(CVPARTS_FLIPCONSOLE,
-                               mySettings.value("Console", true).toBool());
-          cvp->updateShowHide();
-          mySettings.endGroup();
-        }
-      }
-    }
-  }
-  mySettings.endGroup();
 }
 
 //-----------------------------------------------------------------------------
@@ -748,56 +698,6 @@ void MainWindow::writeSettings() {
   QSettings settings(toQString(fp), QSettings::IniFormat);
 
   settings.setValue("MainWindowGeometry", saveGeometry());
-
-  // Recent Files
-  // RecentFiles::instance()->saveRecentFiles();
-
-  fp = ToonzFolder::getMyModuleDir() + TFilePath(mySettingsFileName);
-  QSettings mySettings(toQString(fp), QSettings::IniFormat);
-
-  /*--- Palette-PageViewerのチップサイズの保存 ---*/
-  mySettings.beginGroup("PaletteChipSizes");
-  {
-    mySettings.setValue(
-        "PaletteViewer",
-        PaletteViewerGUI::ChipSizeManager::instance()->chipSize_Palette);
-    mySettings.setValue(
-        "CleanupSettings",
-        PaletteViewerGUI::ChipSizeManager::instance()->chipSize_Cleanup);
-    mySettings.setValue(
-        "StudioPalette",
-        PaletteViewerGUI::ChipSizeManager::instance()->chipSize_Studio);
-  }
-  mySettings.endGroup();
-
-  QStringList roomNames;
-  roomNames << "InknPaint"
-            << "Cleanup"
-            << "PltEdit"
-            << "Schematic"
-            << "QAR";
-  /*--- ComboViewerのパーツのShow/Hideの保存 ---*/
-  mySettings.beginGroup("ComboViewerPartsVisible");
-  {
-    for (int r = 0; r < roomNames.size(); r++) {
-      QString tmpRoomName = roomNames.at(r);
-      Room *tmpRoom       = getRoomByName(tmpRoomName);
-      if (tmpRoom) {
-        ComboViewerPanel *cvp = tmpRoom->getCentralViewerPanel();
-        if (cvp) {
-          mySettings.beginGroup(tmpRoomName);
-          mySettings.setValue("Toolbar", cvp->getShowHideFlag(CVPARTS_TOOLBAR));
-          mySettings.setValue("ToolOptions",
-                              cvp->getShowHideFlag(CVPARTS_TOOLOPTIONS));
-          mySettings.setValue("Console",
-                              cvp->getShowHideFlag(CVPARTS_FLIPCONSOLE));
-          cvp->updateShowHide();
-          mySettings.endGroup();
-        }
-      }
-    }
-  }
-  mySettings.endGroup();
 }
 
 //-----------------------------------------------------------------------------
@@ -817,15 +717,9 @@ Room *MainWindow::createCleanupRoom() {
     cleanupRoom->addDockWidget(viewer);
     layout->dockItem(viewer);
     ComboViewerPanel *cvp = qobject_cast<ComboViewerPanel *>(viewer);
-    if (cvp) {
-      /*- UI隠す -*/
-      cvp->setShowHideFlag(CVPARTS_TOOLBAR, false);
-      cvp->setShowHideFlag(CVPARTS_TOOLOPTIONS, false);
-      cvp->setShowHideFlag(CVPARTS_FLIPCONSOLE, false);
-      cvp->updateShowHide();
-
-      cleanupRoom->setCentralViewerPanel(cvp);
-    }
+    if (cvp)
+      // hide all parts
+      cvp->setVisiblePartsFlag(CVPARTS_None);
   }
 
   // CleanupSettings
@@ -864,11 +758,7 @@ Room *MainWindow::createPltEditRoom() {
     layout->dockItem(viewer);
 
     ComboViewerPanel *cvp = qobject_cast<ComboViewerPanel *>(viewer);
-    if (cvp) {
-      cvp->setShowHideFlag(CVPARTS_FLIPCONSOLE, false);
-      cvp->updateShowHide();
-      pltEditRoom->setCentralViewerPanel(cvp);
-    }
+    if (cvp) cvp->setVisiblePartsFlag(CVPARTS_TOOLBAR | CVPARTS_TOOLOPTIONS);
   }
 
   // Palette
@@ -920,12 +810,6 @@ Room *MainWindow::createInknPaintRoom() {
   if (viewer) {
     inknPaintRoom->addDockWidget(viewer);
     layout->dockItem(viewer);
-
-    ComboViewerPanel *cvp = qobject_cast<ComboViewerPanel *>(viewer);
-    if (cvp) {
-      inknPaintRoom->setCentralViewerPanel(cvp);
-      TApp::instance()->setInknPaintViewerPanel(cvp);
-    }
   }
 
   // Palette
@@ -1959,15 +1843,17 @@ void MainWindow::defineActions() {
                MenuViewCommandType);
   createToggle(MI_ACheck, tr("&Gap Check"), "", ACheckToggleAction ? 1 : 0,
                MenuViewCommandType);
-  QAction* shiftTraceAction = createToggle(MI_ShiftTrace, tr("Shift and Trace"), "", false,
-               MenuViewCommandType);
+  QAction *shiftTraceAction = createToggle(MI_ShiftTrace, tr("Shift and Trace"),
+                                           "", false, MenuViewCommandType);
   shiftTraceAction->setIcon(QIcon(":Resources/shift_and_trace.svg"));
-  shiftTraceAction = createToggle(MI_EditShift, tr("Edit Shift"), "", false, MenuViewCommandType);
+  shiftTraceAction = createToggle(MI_EditShift, tr("Edit Shift"), "", false,
+                                  MenuViewCommandType);
   shiftTraceAction->setIcon(QIcon(":Resources/shift_and_trace_edit.svg"));
   createToggle(MI_NoShift, tr("No Shift"), "", false, MenuViewCommandType);
   CommandManager::instance()->enable(MI_EditShift, false);
   CommandManager::instance()->enable(MI_NoShift, false);
-  shiftTraceAction = createAction(MI_ResetShift, tr("Reset Shift"), "", MenuViewCommandType);
+  shiftTraceAction =
+      createAction(MI_ResetShift, tr("Reset Shift"), "", MenuViewCommandType);
   shiftTraceAction->setIcon(QIcon(":Resources/shift_and_trace_reset.svg"));
 
   if (QGLPixelBuffer::hasOpenGLPbuffers())
diff --git a/toonz/sources/toonz/mainwindow.h b/toonz/sources/toonz/mainwindow.h
index 1c07330..bf11637 100644
--- a/toonz/sources/toonz/mainwindow.h
+++ b/toonz/sources/toonz/mainwindow.h
@@ -30,18 +30,13 @@ class Room final : public TMainWindow {
   TFilePath m_path;
   QString m_name;
 
-  /*--
-   * Room毎にComboViewerの初期状態をLoadするため、MainWindowからComboViewerにアクセスできるようにする。
-   * --*/
-  ComboViewerPanel *m_centralViewer;
-
 public:
 #if QT_VERSION >= 0x050500
   Room(QWidget *parent = 0, Qt::WindowFlags flags = 0)
 #else
   Room(QWidget *parent = 0, Qt::WFlags flags = 0)
 #endif
-      : TMainWindow(parent, flags), m_centralViewer(0) {
+      : TMainWindow(parent, flags) {
   }
 
   ~Room() {}
@@ -52,11 +47,6 @@ public:
   QString getName() const { return m_name; }
   void setName(QString name) { m_name = name; }
 
-  ComboViewerPanel *getCentralViewerPanel() const { return m_centralViewer; }
-  void setCentralViewerPanel(ComboViewerPanel *cvp) {
-    if (!m_centralViewer) m_centralViewer = cvp;
-  }
-
   void save();
   void load(const TFilePath &fp);
 };
diff --git a/toonz/sources/toonz/sceneviewerevents.cpp b/toonz/sources/toonz/sceneviewerevents.cpp
index e92f90d..e9196d2 100644
--- a/toonz/sources/toonz/sceneviewerevents.cpp
+++ b/toonz/sources/toonz/sceneviewerevents.cpp
@@ -1096,19 +1096,21 @@ bool SceneViewer::event(QEvent *e) {
       break;
     }
   */
-  if (CommandManager::instance()
+  if (e->type() == QEvent::Gesture &&
+      CommandManager::instance()
           ->getAction(MI_TouchGestureControl)
           ->isChecked()) {
-    if (e->type() == QEvent::Gesture) {
-      gestureEvent(static_cast<QGestureEvent *>(e));
-      return true;
-    }
-    if (e->type() == QEvent::TouchBegin || e->type() == QEvent::TouchEnd ||
-        e->type() == QEvent::TouchCancel || e->type() == QEvent::TouchUpdate) {
-      touchEvent(static_cast<QTouchEvent *>(e), e->type());
-      m_gestureActive = true;
-      return true;
-    }
+    gestureEvent(static_cast<QGestureEvent *>(e));
+    return true;
+  }
+  if ((e->type() == QEvent::TouchBegin || e->type() == QEvent::TouchEnd ||
+       e->type() == QEvent::TouchCancel || e->type() == QEvent::TouchUpdate) &&
+      CommandManager::instance()
+          ->getAction(MI_TouchGestureControl)
+          ->isChecked()) {
+    touchEvent(static_cast<QTouchEvent *>(e), e->type());
+    m_gestureActive = true;
+    return true;
   }
   if (e->type() == QEvent::ShortcutOverride || e->type() == QEvent::KeyPress) {
     if (!((QKeyEvent *)e)->isAutoRepeat()) {
@@ -1474,8 +1476,8 @@ void SceneViewer::onContextMenu(const QPoint &pos, const QPoint &globalPos) {
 
   menu->addLevelCommands(columnIndices);
 
-  ComboViewerPanel *cvp = qobject_cast<ComboViewerPanel *>(
-      parentWidget()->parentWidget()->parentWidget());
+  ComboViewerPanel *cvp =
+      qobject_cast<ComboViewerPanel *>(parentWidget()->parentWidget());
   if (cvp) {
     menu->addSeparator();
     cvp->addShowHideContextMenu(menu);
diff --git a/toonz/sources/toonz/tapp.h b/toonz/sources/toonz/tapp.h
index 2779ee0..ae97c52 100644
--- a/toonz/sources/toonz/tapp.h
+++ b/toonz/sources/toonz/tapp.h
@@ -81,9 +81,6 @@ class TApp final : public QObject,
 
   QMainWindow *m_mainWindow;
 
-  // keep a pointer of the inknpaint viewer in order to enable navigator pan in
-  // the filmstrip
-  ComboViewerPanel *m_inknPaintViewerPanel;
   SceneViewer *m_activeViewer;
   XsheetViewer *m_xsheetViewer;
 
@@ -190,16 +187,11 @@ public:
 
   QString getCurrentRoomName() const;
 
-  // keep a pointer of the inknpaint viewer in order to enable navigator pan in
-  // the filmstrip
-  void setInknPaintViewerPanel(ComboViewerPanel *panel) {
-    m_inknPaintViewerPanel = panel;
+  void setActiveViewer(SceneViewer *viewer) {
+    if (m_activeViewer == viewer) return;
+    m_activeViewer = viewer;
+    emit activeViewerChanged();
   }
-  ComboViewerPanel *getInknPaintViewerPanel() const {
-    return m_inknPaintViewerPanel;
-  }
-
-  void setActiveViewer(SceneViewer *viewer) { m_activeViewer = viewer; }
 
   SceneViewer *getActiveViewer() const { return m_activeViewer; }
 
@@ -254,6 +246,9 @@ signals:
   // NOTE: For now QEvent::TabletLeaveProximity is NOT detected on Windows. See
   // QTBUG-53628.
   void tabletLeft();
+
+  void
+  activeViewerChanged();  // TODO: put widgets-related stuffs in some new handle
 };
 
 #endif  // TAPP_H
diff --git a/toonz/sources/toonz/tpanels.cpp b/toonz/sources/toonz/tpanels.cpp
index 6092c3c..0f77011 100644
--- a/toonz/sources/toonz/tpanels.cpp
+++ b/toonz/sources/toonz/tpanels.cpp
@@ -626,6 +626,17 @@ void StudioPaletteViewerPanel::onPaletteSwitched() {
       m_studioPaletteHandle);
 }
 
+//-----------------------------------------------------------------------------
+
+void StudioPaletteViewerPanel::setViewType(int viewType) {
+  m_studioPaletteViewer->setViewMode(viewType);
+}
+//-----------------------------------------------------------------------------
+
+int StudioPaletteViewerPanel::getViewType() {
+  return m_studioPaletteViewer->getViewMode();
+}
+
 //=============================================================================
 // StudioPaletteViewerFactory
 //-----------------------------------------------------------------------------
@@ -1264,21 +1275,43 @@ OpenFloatingPanel openLineTestCaptureCommand(MI_OpenLineTestCapture,
 // ComboViewer : Viewer + Toolbar + Tool Options
 //-----------------------------------------------------------------------------
 
+ComboViewerPanelContainer::ComboViewerPanelContainer(QWidget *parent)
+    : StyleShortcutSwitchablePanel(parent) {
+  m_comboViewer = new ComboViewerPanel(parent);
+  setFocusProxy(m_comboViewer);
+  setWidget(m_comboViewer);
+
+  m_comboViewer->initializeTitleBar(getTitleBar());
+  bool ret = connect(m_comboViewer->getToolOptions(), SIGNAL(newPanelCreated()),
+                     this, SLOT(updateTabFocus()));
+  assert(ret);
+}
+// reimplementation of TPanel::widgetInThisPanelIsFocused
+bool ComboViewerPanelContainer::widgetInThisPanelIsFocused() {
+  return m_comboViewer->hasFocus();
+}
+// reimplementation of TPanel::widgetFocusOnEnter
+void ComboViewerPanelContainer::widgetFocusOnEnter() {
+  m_comboViewer->onEnterPanel();
+}
+void ComboViewerPanelContainer::widgetClearFocusOnLeave() {
+  m_comboViewer->onLeavePanel();
+}
+
+//-----------------------------------------------------------------------------
+
 class ComboViewerFactory final : public TPanelFactory {
 public:
   ComboViewerFactory() : TPanelFactory("ComboViewer") {}
   TPanel *createPanel(QWidget *parent) override {
-    ComboViewerPanel *panel = new ComboViewerPanel(parent);
+    ComboViewerPanelContainer *panel = new ComboViewerPanelContainer(parent);
     panel->setObjectName(getPanelType());
     panel->setWindowTitle(QObject::tr("Combo Viewer"));
     panel->resize(700, 600);
     return panel;
   }
-  void initialize(TPanel *panel) override {
-    assert(0);
-    panel->setWidget(new ComboViewerPanel(panel));
-  }
-} ghibliViewerFactory;
+  void initialize(TPanel *panel) override { assert(0); }
+} comboViewerFactory;
 
 //=============================================================================
 OpenFloatingPanel openComboViewerCommand(MI_OpenComboViewer, "ComboViewer",
diff --git a/toonz/sources/toonz/tpanels.h b/toonz/sources/toonz/tpanels.h
index db50598..2a0498a 100644
--- a/toonz/sources/toonz/tpanels.h
+++ b/toonz/sources/toonz/tpanels.h
@@ -24,6 +24,7 @@ class SchematicViewer;
 class FunctionViewer;
 class FlipBook;
 class ToolOptions;
+class ComboViewerPanel;
 //=========================================================
 // PaletteViewerPanel
 //---------------------------------------------------------
@@ -69,6 +70,9 @@ class StudioPaletteViewerPanel final : public TPanel {
 public:
   StudioPaletteViewerPanel(QWidget *parent);
 
+  void setViewType(int viewType) override;
+  int getViewType() override;
+
 protected:
   bool isActivatableOnEnter() override { return true; }
 protected slots:
@@ -244,4 +248,23 @@ protected slots:
   void onMinimizeButtonToggled(bool);
 };
 
+//=========================================================
+// ComboViewerPanel
+//---------------------------------------------------------
+
+class ComboViewerPanelContainer final : public StyleShortcutSwitchablePanel {
+  Q_OBJECT
+  ComboViewerPanel *m_comboViewer;
+
+public:
+  ComboViewerPanelContainer(QWidget *parent);
+  // reimplementation of TPanel::widgetInThisPanelIsFocused
+  bool widgetInThisPanelIsFocused() override;
+
+protected:
+  // reimplementation of TPanel::widgetFocusOnEnter
+  void widgetFocusOnEnter() override;
+  void widgetClearFocusOnLeave() override;
+};
+
 #endif
diff --git a/toonz/sources/toonzqt/functionpanel.cpp b/toonz/sources/toonzqt/functionpanel.cpp
index b6ee8a2..85535d5 100644
--- a/toonz/sources/toonzqt/functionpanel.cpp
+++ b/toonz/sources/toonzqt/functionpanel.cpp
@@ -263,13 +263,11 @@ FunctionPanel::FunctionPanel(QWidget *parent, bool isFloating)
 
   if (m_isFloating) {
     // load the dialog size
-    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath(mySettingsFileName));
-    QSettings mySettings(toQString(fp), QSettings::IniFormat);
+    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath("popups.ini"));
+    QSettings settings(toQString(fp), QSettings::IniFormat);
 
-    mySettings.beginGroup("Dialogs");
     setGeometry(
-        mySettings.value("FunctionCurves", QRect(500, 500, 400, 300)).toRect());
-    mySettings.endGroup();
+        settings.value("FunctionCurves", QRect(500, 500, 400, 300)).toRect());
   }
 }
 
@@ -278,12 +276,10 @@ FunctionPanel::FunctionPanel(QWidget *parent, bool isFloating)
 FunctionPanel::~FunctionPanel() {
   if (m_isFloating) {
     // save the dialog size
-    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath(mySettingsFileName));
-    QSettings mySettings(toQString(fp), QSettings::IniFormat);
+    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath("popups.ini"));
+    QSettings settings(toQString(fp), QSettings::IniFormat);
 
-    mySettings.beginGroup("Dialogs");
-    mySettings.setValue("FunctionCurves", geometry());
-    mySettings.endGroup();
+    settings.setValue("FunctionCurves", geometry());
   }
 
   delete m_dragTool;
diff --git a/toonz/sources/toonzqt/functionsheet.cpp b/toonz/sources/toonzqt/functionsheet.cpp
index caf0544..3b50a52 100644
--- a/toonz/sources/toonzqt/functionsheet.cpp
+++ b/toonz/sources/toonzqt/functionsheet.cpp
@@ -977,14 +977,11 @@ FunctionSheet::FunctionSheet(QWidget *parent, bool isFloating)
 
   if (m_isFloating) {
     // load the dialog size
-    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath(mySettingsFileName));
-    QSettings mySettings(toQString(fp), QSettings::IniFormat);
-
-    mySettings.beginGroup("Dialogs");
-    setGeometry(
-        mySettings.value("FunctionSpreadsheet", QRect(500, 500, 400, 300))
-            .toRect());
-    mySettings.endGroup();
+    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath("popups.ini"));
+    QSettings settings(toQString(fp), QSettings::IniFormat);
+
+    setGeometry(settings.value("FunctionSpreadsheet", QRect(500, 500, 400, 300))
+                    .toRect());
   }
 }
 
@@ -992,12 +989,10 @@ FunctionSheet::FunctionSheet(QWidget *parent, bool isFloating)
 
 FunctionSheet::~FunctionSheet() {
   if (m_isFloating) {
-    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath(mySettingsFileName));
-    QSettings mySettings(toQString(fp), QSettings::IniFormat);
+    TFilePath fp(ToonzFolder::getMyModuleDir() + TFilePath("popups.ini"));
+    QSettings settings(toQString(fp), QSettings::IniFormat);
 
-    mySettings.beginGroup("Dialogs");
-    mySettings.setValue("FunctionSpreadsheet", geometry());
-    mySettings.endGroup();
+    settings.setValue("FunctionSpreadsheet", geometry());
   }
 }
 
diff --git a/toonz/sources/toonzqt/paletteviewergui.cpp b/toonz/sources/toonzqt/paletteviewergui.cpp
index f85439e..2bb782a 100644
--- a/toonz/sources/toonzqt/paletteviewergui.cpp
+++ b/toonz/sources/toonzqt/paletteviewergui.cpp
@@ -138,16 +138,16 @@ PageViewer::PageViewer(QWidget *parent, PaletteViewType viewType,
   ViewMode defaultChipSize;
   switch (m_viewType) {
   case LEVEL_PALETTE:
-    defaultChipSize = (ViewMode)ChipSizeManager::instance()->chipSize_Palette;
+    defaultChipSize = LargeChips;
     break;
   case CLEANUP_PALETTE:
-    defaultChipSize = (ViewMode)ChipSizeManager::instance()->chipSize_Cleanup;
+    defaultChipSize = SmallChips;
     break;
   case STUDIO_PALETTE:
-    defaultChipSize = (ViewMode)ChipSizeManager::instance()->chipSize_Studio;
+    defaultChipSize = MediumChips;
     break;
   default:
-    defaultChipSize = (ViewMode)2;
+    defaultChipSize = LargeChips;
     break;
   }
   setViewMode(defaultChipSize);
@@ -246,21 +246,6 @@ void PageViewer::setViewMode(ViewMode viewMode) {
   m_viewMode = viewMode;
   computeSize();
   update();
-
-  // keep new view mode for reproducing the same mode when a new palette is made
-  switch (m_viewType) {
-  case LEVEL_PALETTE:
-    ChipSizeManager::instance()->chipSize_Palette = (int)m_viewMode;
-    break;
-  case CLEANUP_PALETTE:
-    ChipSizeManager::instance()->chipSize_Cleanup = (int)m_viewMode;
-    break;
-  case STUDIO_PALETTE:
-    ChipSizeManager::instance()->chipSize_Studio = (int)m_viewMode;
-    break;
-  default:
-    break;
-  }
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/toonzqt/studiopaletteviewer.cpp b/toonz/sources/toonzqt/studiopaletteviewer.cpp
index a033f05..25f1419 100644
--- a/toonz/sources/toonzqt/studiopaletteviewer.cpp
+++ b/toonz/sources/toonzqt/studiopaletteviewer.cpp
@@ -1191,17 +1191,17 @@ StudioPaletteViewer::StudioPaletteViewer(QWidget *parent,
   treeWidget->setLayout(treeVLayout);
 
   // Second Splitter Widget
-  PaletteViewer *studioPaletteViewer =
+  m_studioPaletteViewer =
       new PaletteViewer(this, PaletteViewerGUI::STUDIO_PALETTE);
-  studioPaletteViewer->setObjectName("PaletteViewerInStudioPalette");
-  studioPaletteViewer->setXsheetHandle(xsheetHandle);
-  studioPaletteViewer->setPaletteHandle(studioPaletteHandle);
-  studioPaletteViewer->setFrameHandle(frameHandle);
+  m_studioPaletteViewer->setObjectName("PaletteViewerInStudioPalette");
+  m_studioPaletteViewer->setXsheetHandle(xsheetHandle);
+  m_studioPaletteViewer->setPaletteHandle(studioPaletteHandle);
+  m_studioPaletteViewer->setFrameHandle(frameHandle);
 
   addWidget(treeWidget);
-  addWidget(studioPaletteViewer);
+  addWidget(m_studioPaletteViewer);
 
-  setFocusProxy(studioPaletteViewer);
+  setFocusProxy(m_studioPaletteViewer);
 }
 
 //-----------------------------------------------------------------------------
@@ -1214,3 +1214,16 @@ StudioPaletteViewer::~StudioPaletteViewer() {}
 TFilePath StudioPaletteViewer::getCurrentItemPath() {
   return m_studioPaletteTreeViewer->getCurrentItemPath();
 }
+
+//-----------------------------------------------------------------------------
+
+int StudioPaletteViewer::getViewMode() const {
+  return m_studioPaletteViewer->getViewMode();
+}
+
+//-----------------------------------------------------------------------------
+
+void StudioPaletteViewer::setViewMode(int mode) {
+  m_studioPaletteViewer->setViewMode(
+      (PaletteViewerGUI::PageViewer::ViewMode)mode);
+}
\ No newline at end of file