diff --git a/toonz/sources/include/toonz/tpalettehandle.h b/toonz/sources/include/toonz/tpalettehandle.h
index c2bdd1dc..30539ff0 100644
--- a/toonz/sources/include/toonz/tpalettehandle.h
+++ b/toonz/sources/include/toonz/tpalettehandle.h
@@ -46,7 +46,7 @@ public:
 
   void setPalette(TPalette *palette, int styleIndex = 1);
 
-  void setStyleIndex(int index);
+  void setStyleIndex(int index, bool forceEmit = false);
 
   void setStyleParamIndex(int index);
 
diff --git a/toonz/sources/toonzlib/tpalettehandle.cpp b/toonz/sources/toonzlib/tpalettehandle.cpp
index 8937b21e..fd0835ec 100644
--- a/toonz/sources/toonzlib/tpalettehandle.cpp
+++ b/toonz/sources/toonzlib/tpalettehandle.cpp
@@ -142,9 +142,11 @@ void TPaletteHandle::setPalette(TPalette *palette, int styleIndex) {
 }
 
 //-----------------------------------------------------------------------------
+// forceEmit flag is used in PageViewer.
+// See the function PageViewer::setCurrentStyleIndex() in paletteviewergui.cpp
 
-void TPaletteHandle::setStyleIndex(int index) {
-  if (m_styleIndex != index || m_styleParamIndex != 0) {
+void TPaletteHandle::setStyleIndex(int index, bool forceEmit) {
+  if (m_styleIndex != index || m_styleParamIndex != 0 || forceEmit) {
     m_styleIndex      = index;
     m_styleParamIndex = 0;
     emit broadcastColorStyleSwitched();
diff --git a/toonz/sources/toonzqt/paletteviewergui.cpp b/toonz/sources/toonzqt/paletteviewergui.cpp
index 2bb782a3..db6c68e2 100644
--- a/toonz/sources/toonzqt/paletteviewergui.cpp
+++ b/toonz/sources/toonzqt/paletteviewergui.cpp
@@ -212,7 +212,12 @@ TFrameHandle *PageViewer::getFrameHandle() const { return m_frameHandle; }
 //-----------------------------------------------------------------------------
 
 void PageViewer::setCurrentStyleIndex(int index) {
-  getPaletteHandle()->setStyleIndex(index);
+  // When clicking and switching between studio palette and level palette, the
+  // signal broadcastColorStyleSwitched is not emitted if the clicked style is
+  // previously selected one.
+  // Therefore here I introduced the "forceEmit" flag here in order to emit the
+  // signal whenever the style is clicked.
+  getPaletteHandle()->setStyleIndex(index, true);
 }
 
 //-----------------------------------------------------------------------------