diff --git a/toonz/sources/include/toonz/txshzeraryfxcolumn.h b/toonz/sources/include/toonz/txshzeraryfxcolumn.h
index 07730a3..9cdcfeb 100644
--- a/toonz/sources/include/toonz/txshzeraryfxcolumn.h
+++ b/toonz/sources/include/toonz/txshzeraryfxcolumn.h
@@ -37,7 +37,11 @@ class DVAPI TXshZeraryFxColumn final : public TXshCellColumn {
   TZeraryColumnFx *m_zeraryColumnFx;
   TXshZeraryFxLevel *m_zeraryFxLevel;
 
+  bool m_iconVisible;
+
 public:
+  bool isIconVisible() { return m_iconVisible; }
+  void setIconVisible(bool visible) { m_iconVisible = visible; }
   /*!
 Constructs a TXshZeraryFxColumn with default value.
 */
diff --git a/toonz/sources/include/toonzqt/fxiconmanager.h b/toonz/sources/include/toonzqt/fxiconmanager.h
index 25c2b09..8d84466 100644
--- a/toonz/sources/include/toonzqt/fxiconmanager.h
+++ b/toonz/sources/include/toonzqt/fxiconmanager.h
@@ -8,6 +8,17 @@
 #define FXICONMANAGER_H
 
 #include "tcommon.h"
+#include <QPixmap>
+
+#undef DVAPI
+#undef DVVAR
+#ifdef TOONZQT_EXPORTS
+#define DVAPI DV_EXPORT_API
+#define DVVAR DV_EXPORT_VAR
+#else
+#define DVAPI DV_IMPORT_API
+#define DVVAR DV_IMPORT_VAR
+#endif
 
 class QPixmap;
 
@@ -136,13 +147,17 @@ const struct {
     {0, 0}};
 };
 
-class FxIconPixmapManager {  // singleton
 
+class DVAPI FxIconPixmapManager final : public QObject {  // singleton
+  Q_OBJECT
+
+public:
   std::map<std::string, QPixmap> m_pms;
 
+public:
   FxIconPixmapManager();
+  ~FxIconPixmapManager();
 
-public:
   static FxIconPixmapManager *instance();
 
   const QPixmap &getFxIconPm(std::string type);
diff --git a/toonz/sources/toonz/xshcolumnviewer.cpp b/toonz/sources/toonz/xshcolumnviewer.cpp
index bf31ee1..5562eed 100644
--- a/toonz/sources/toonz/xshcolumnviewer.cpp
+++ b/toonz/sources/toonz/xshcolumnviewer.cpp
@@ -17,6 +17,7 @@
 #include "toonzqt/gutil.h"
 #include "toonzqt/icongenerator.h"
 #include "toonzqt/intfield.h"
+#include "toonzqt/fxiconmanager.h"
 
 // TnzLib includes
 #include "toonz/txshcolumn.h"
@@ -1061,29 +1062,18 @@ void ColumnArea::DrawHeader::drawThumbnail(QPixmap &iconPixmap) const {
   // All other thumbnails
   p.setPen(m_viewer->getTextColor());
 
-  // for zerary fx, display fxId here instead of thumbnail
-  TXshZeraryFxColumn *zColumn = dynamic_cast<TXshZeraryFxColumn *>(column);
-  if (zColumn) {
-    QFont lastfont = p.font();
-    QFont font("Verdana", 8);
-    p.setFont(font);
-
-    TFx *fx        = zColumn->getZeraryColumnFx()->getZeraryFx();
-    QString fxName = QString::fromStdWString(fx->getFxId());
-    p.drawText(thumbnailImageRect, Qt::TextWrapAnywhere | Qt::TextWordWrap,
-               fxName);
-    p.setFont(lastfont);
+  TXshLevelColumn *levelColumn = column->getLevelColumn();
+  TXshMeshColumn *meshColumn   = column->getMeshColumn();
+  TXshZeraryFxColumn *zColumn  = dynamic_cast<TXshZeraryFxColumn *>(column);
+
+  if (Preferences::instance()->getColumnIconLoadingPolicy() ==
+          Preferences::LoadOnDemand &&
+      ((levelColumn && !levelColumn->isIconVisible()) ||
+       (meshColumn && !meshColumn->isIconVisible()) ||
+       (zColumn && !zColumn->isIconVisible())) &&
+      col >= 0) {
+    // display nothing
   } else {
-    TXshLevelColumn *levelColumn = column->getLevelColumn();
-    TXshMeshColumn *meshColumn   = column->getMeshColumn();
-
-    if (Preferences::instance()->getColumnIconLoadingPolicy() ==
-            Preferences::LoadOnDemand &&
-        ((levelColumn && !levelColumn->isIconVisible()) ||
-         (meshColumn && !meshColumn->isIconVisible())) &&
-        col >= 0) {
-      // display nothing
-    } else {
       if (!iconPixmap.isNull()) {
         p.drawPixmap(thumbnailImageRect, iconPixmap);
       }
@@ -1092,6 +1082,8 @@ void ColumnArea::DrawHeader::drawThumbnail(QPixmap &iconPixmap) const {
         levelColumn->setIconVisible(true);
       else if (meshColumn)
         meshColumn->setIconVisible(true);
+      else if (zColumn)
+        zColumn->setIconVisible(true);
     }
   }
 }
@@ -1651,21 +1643,28 @@ QPixmap ColumnArea::getColumnIcon(int columnIndex) {
   if (!xl)
     return QPixmap();
   else {
-    bool onDemand = false;
+    TXshColumn *column          = xsh->getColumn(columnIndex);
+    TXshZeraryFxColumn *zColumn = dynamic_cast<TXshZeraryFxColumn *>(column);
+    bool onDemand               = false;
     if (Preferences::instance()->getColumnIconLoadingPolicy() ==
         Preferences::LoadOnDemand) {
       onDemand = m_viewer->getCurrentColumn() != columnIndex;
       if (!onDemand) {
-        TXshColumn *column           = xsh->getColumn(columnIndex);
+        
         TXshLevelColumn *levelColumn = column->getLevelColumn();
         TXshMeshColumn *meshColumn   = column->getMeshColumn();
         if ((levelColumn && !levelColumn->isIconVisible()) ||
-            (meshColumn && !meshColumn->isIconVisible()))
+            (meshColumn && !meshColumn->isIconVisible()) ||
+            (zColumn && !zColumn->isIconVisible()))
           return QPixmap();
       }
     }
     QPixmap icon =
-        IconGenerator::instance()->getIcon(xl, cell.m_frameId, false, onDemand);
+        zColumn
+            ? FxIconPixmapManager::instance()->getFxIconPm(
+                  zColumn->getZeraryColumnFx()->getZeraryFx()->getFxType())
+            : IconGenerator::instance()->getIcon(xl, cell.m_frameId, false,
+                                                 onDemand);
     QRect thumbnailImageRect = o->rect(PredefinedRect::THUMBNAIL);
     if (thumbnailImageRect.isEmpty()) return QPixmap();
     return scalePixmapKeepingAspectRatio(icon, thumbnailImageRect.size());
@@ -2229,6 +2228,8 @@ void ColumnArea::mousePressEvent(QMouseEvent *event) {
           // toggle columnIcon visibility with alt+click
           TXshLevelColumn *levelColumn = column->getLevelColumn();
           TXshMeshColumn *meshColumn   = column->getMeshColumn();
+          TXshZeraryFxColumn *zColumn =
+              dynamic_cast<TXshZeraryFxColumn *>(column);
           if (Preferences::instance()->getColumnIconLoadingPolicy() ==
                   Preferences::LoadOnDemand &&
               (event->modifiers() & Qt::AltModifier)) {
@@ -2236,6 +2237,8 @@ void ColumnArea::mousePressEvent(QMouseEvent *event) {
               levelColumn->setIconVisible(!levelColumn->isIconVisible());
             else if (meshColumn)
               meshColumn->setIconVisible(!meshColumn->isIconVisible());
+            else if (zColumn)
+              zColumn->setIconVisible(!zColumn->isIconVisible());
           }
         }
       }
diff --git a/toonz/sources/toonzlib/txshzeraryfxcolumn.cpp b/toonz/sources/toonzlib/txshzeraryfxcolumn.cpp
index ccc5388..03c125f 100644
--- a/toonz/sources/toonzlib/txshzeraryfxcolumn.cpp
+++ b/toonz/sources/toonzlib/txshzeraryfxcolumn.cpp
@@ -15,7 +15,8 @@
 
 TXshZeraryFxColumn::TXshZeraryFxColumn(int frameCount)
     : m_zeraryColumnFx(new TZeraryColumnFx())
-    , m_zeraryFxLevel(new TXshZeraryFxLevel()) {
+    , m_zeraryFxLevel(new TXshZeraryFxLevel())
+    , m_iconVisible(false) {
   m_zeraryColumnFx->addRef();
   m_zeraryColumnFx->setColumn(this);
   m_zeraryFxLevel->addRef();
diff --git a/toonz/sources/toonzqt/CMakeLists.txt b/toonz/sources/toonzqt/CMakeLists.txt
index eb8536a..6c8451e 100644
--- a/toonz/sources/toonzqt/CMakeLists.txt
+++ b/toonz/sources/toonzqt/CMakeLists.txt
@@ -27,6 +27,7 @@ set(MOC_HEADERS
     ../include/toonzqt/functiontreeviewer.h
     ../include/toonzqt/functionviewer.h
     ../include/toonzqt/fxhistogramrender.h
+    ../include/toonzqt/fxiconmanager.h
     ../include/toonzqt/fxschematicnode.h
     ../include/toonzqt/fxschematicscene.h
     ../include/toonzqt/fxselection.h
@@ -87,7 +88,6 @@ set(HEADERS
     ../include/toonzqt/dvmimedata.h
     ../include/toonzqt/flipconsoleowner.h
     ../include/toonzqt/freelayout.h
-    ../include/toonzqt/fxiconmanager.h
     ../include/toonzqt/fxtypes.h
     ../include/toonzqt/glwidget_for_highdpi.h
     ../include/toonzqt/lutcalibrator.h
diff --git a/toonz/sources/toonzqt/fxiconmanager.cpp b/toonz/sources/toonzqt/fxiconmanager.cpp
index a423a0a..d5da64a 100644
--- a/toonz/sources/toonzqt/fxiconmanager.cpp
+++ b/toonz/sources/toonzqt/fxiconmanager.cpp
@@ -4,6 +4,8 @@
 
 FxIconPixmapManager::FxIconPixmapManager() {}
 
+FxIconPixmapManager::~FxIconPixmapManager() {}
+
 FxIconPixmapManager *FxIconPixmapManager::instance() {
   static FxIconPixmapManager _instance;
   return &_instance;