diff --git a/toonz/sources/include/toonzqt/paramfield.h b/toonz/sources/include/toonzqt/paramfield.h
index fcd5e24..5a0b4c3 100644
--- a/toonz/sources/include/toonzqt/paramfield.h
+++ b/toonz/sources/include/toonzqt/paramfield.h
@@ -91,7 +91,7 @@ public:
 
   virtual void setPointValue(const TPointD &p){};
 
-  virtual QSize getPreferedSize() { return QSize(200, 28); }
+  virtual QSize getPreferredSize() { return QSize(200, 28); }
 
   static void setFxHandle(TFxHandle *fxHandle);
 
@@ -369,7 +369,7 @@ public:
 
   void updateField(double value) override;
 
-  QSize getPreferedSize() override { return QSize(260, 26); }
+  QSize getPreferredSize() override { return QSize(260, 26); }
   void setPrecision(int precision) override;
 
 protected slots:
@@ -393,7 +393,7 @@ public:
 
   void updateField(DoublePair value) override;
 
-  QSize getPreferedSize() override { return QSize(300, 20); }
+  QSize getPreferredSize() override { return QSize(300, 20); }
   void setPrecision(int precision) override;
 
 protected slots:
@@ -418,7 +418,7 @@ public:
 
   void updateField(TPointD value) override;
 
-  QSize getPreferedSize() override { return QSize(270, 28); }
+  QSize getPreferredSize() override { return QSize(270, 28); }
 
 protected slots:
   void onChange(bool);
@@ -440,7 +440,7 @@ public:
 
   void updateField(TPixel32 value) override;
 
-  QSize getPreferedSize() override { return QSize(480, 40); }
+  QSize getPreferredSize() override { return QSize(480, 40); }
 
   /*-- RgbLinkButtonの実行のため --*/
   TPixel32 getColor();
@@ -489,7 +489,7 @@ public:
 
   void setParams();
 
-  QSize getPreferedSize() override { return QSize(477, 60); }
+  QSize getPreferredSize() override { return QSize(477, 60); }
 
 protected slots:
   void onKeyToggled();
@@ -544,7 +544,7 @@ public:
                 int frame) override;
   void update(int frame) override;
 
-  QSize getPreferedSize() override { return QSize(150, 20); }
+  QSize getPreferredSize() override { return QSize(150, 20); }
 
 protected slots:
   void onChange(const QString &str);
@@ -567,7 +567,7 @@ public:
                 int frame) override;
   void update(int frame) override;
 
-  QSize getPreferedSize() override { return QSize(20, 15); }
+  QSize getPreferredSize() override { return QSize(20, 15); }
 
 protected slots:
   void onToggled(bool checked);
@@ -596,7 +596,7 @@ public:
                 int frame) override;
   void update(int frame) override;
 
-  QSize getPreferedSize() override { return QSize(50, 19); }
+  QSize getPreferredSize() override { return QSize(50, 19); }
 
 protected slots:
   void onChange(bool isDragging = false);
@@ -636,7 +636,7 @@ public:
                 int frame) override;
   void update(int frame) override;
 
-  QSize getPreferedSize() override {
+  QSize getPreferredSize() override {
     if (m_textFld)
       return QSize(100, 20);
     else
@@ -666,7 +666,7 @@ public:
                 int frame) override;
   void update(int frame) override;
 
-  QSize getPreferedSize() override { return QSize(150, 20); }
+  QSize getPreferredSize() override { return QSize(150, 20); }
 
 protected slots:
   void findStyles(const QFont &font);
@@ -692,7 +692,7 @@ public:
 
   void setParams();
 
-  QSize getPreferedSize() override;
+  QSize getPreferredSize() override;
 
 protected slots:
   void onChannelChanged(int);
diff --git a/toonz/sources/toonzqt/fxsettings.cpp b/toonz/sources/toonzqt/fxsettings.cpp
index fa9bbea..3690a3a 100644
--- a/toonz/sources/toonzqt/fxsettings.cpp
+++ b/toonz/sources/toonzqt/fxsettings.cpp
@@ -590,7 +590,7 @@ QSize getItemSize(QLayoutItem *item) {
   }
 
   ParamField *pF = dynamic_cast<ParamField *>(item->widget());
-  if (pF) return pF->getPreferedSize();
+  if (pF) return pF->getPreferredSize();
 
   Separator *sep = dynamic_cast<Separator *>(item->widget());
   if (sep) return QSize(0, 16);
diff --git a/toonz/sources/toonzqt/paramfield.cpp b/toonz/sources/toonzqt/paramfield.cpp
index aaafc9d..e9b5e78 100644
--- a/toonz/sources/toonzqt/paramfield.cpp
+++ b/toonz/sources/toonzqt/paramfield.cpp
@@ -1862,7 +1862,7 @@ void ToneCurveParamField::setParams() {
 
 //-----------------------------------------------------------------------------
 
-QSize ToneCurveParamField::getPreferedSize() {
+QSize ToneCurveParamField::getPreferredSize() {
   if (m_toneCurveField->isEnlarged())
     return QSize(676, 640);
   else