diff --git a/toonz/sources/toonz/sceneviewer.h b/toonz/sources/toonz/sceneviewer.h
index e87e1bb..574df1a 100644
--- a/toonz/sources/toonz/sceneviewer.h
+++ b/toonz/sources/toonz/sceneviewer.h
@@ -66,7 +66,8 @@ class SceneViewer final : public GLWidgetForHighDpi,
   Qt::MouseButton m_mouseButton;
 
   bool m_foregroundDrawing;
-  bool m_tabletEvent, m_tabletPressed, m_tabletReleased, m_tabletMove, m_tabletActive;
+  bool m_tabletEvent, m_tabletPressed, m_tabletReleased, m_tabletMove,
+      m_tabletActive;
   // used to handle wrong mouse drag events!
   bool m_buttonClicked, m_toolSwitched;
   bool m_shownOnce = false;
diff --git a/toonz/sources/toonz/sceneviewerevents.cpp b/toonz/sources/toonz/sceneviewerevents.cpp
index de274bf..8553db2 100644
--- a/toonz/sources/toonz/sceneviewerevents.cpp
+++ b/toonz/sources/toonz/sceneviewerevents.cpp
@@ -201,15 +201,15 @@ void SceneViewer::onButtonPressed(FlipConsole::EGadget button) {
 void SceneViewer::tabletEvent(QTabletEvent *e) {
   if (m_freezedStatus != NO_FREEZED) return;
 
-  m_tabletEvent = true;
-  m_pressure    = e->pressure();
-  m_tabletPressed = false;
-  m_tabletReleased = false;
-  m_tabletMove = false;
-  int type = e->type();
-  if (type == 92) m_tabletPressed = true;
+  m_tabletEvent                    = true;
+  m_pressure                       = e->pressure();
+  m_tabletPressed                  = false;
+  m_tabletReleased                 = false;
+  m_tabletMove                     = false;
+  int type                         = e->type();
+  if (type == 92) m_tabletPressed  = true;
   if (type == 93) m_tabletReleased = true;
-  if (type == 87) m_tabletMove = true;
+  if (type == 87) m_tabletMove     = true;
   // Management of the Eraser pointer
   ToolHandle *toolHandle = TApp::instance()->getCurrentTool();
   if (e->pointerType() == QTabletEvent::Eraser) {
@@ -383,11 +383,11 @@ void SceneViewer::mouseMoveEvent(QMouseEvent *event) {
     //         << " pressure=" << m_pressure << " mouseButton=" << m_mouseButton
     //         << " buttonClicked=" << m_buttonClicked;
 
-    //separate tablet events from mouse events
-    //don't perform a drag event if tablet not active
-    if (m_tabletActive && !m_tabletMove)  return;
+    // separate tablet events from mouse events
+    // don't perform a drag event if tablet not active
+    if (m_tabletActive && !m_tabletMove) return;
     if (m_tabletEvent && m_tabletActive && m_tabletMove) {
-        tool->leftButtonDrag(pos, toonzEvent);
+      tool->leftButtonDrag(pos, toonzEvent);
     }
 
     else if (m_mouseButton == Qt::LeftButton) {
@@ -400,7 +400,7 @@ void SceneViewer::mouseMoveEvent(QMouseEvent *event) {
       // m_tabletEvent=false;
     }
     if (!cursorSet) setToolCursor(this, tool->getCursorId());
-    m_pos = curPos;
+    m_pos        = curPos;
     m_tabletMove = false;
   } else if (m_mouseButton == Qt::MidButton) {
     if ((event->buttons() & Qt::MidButton) == 0)
@@ -502,10 +502,9 @@ void SceneViewer::mousePressEvent(QMouseEvent *event) {
   }
   // separate tablet and mouse events
   if (m_tabletEvent && m_tabletPressed) {
-      m_tabletActive = true;
-      tool->leftButtonDown(pos, toonzEvent);
-  }
-  else if (m_mouseButton == Qt::LeftButton) {
+    m_tabletActive = true;
+    tool->leftButtonDown(pos, toonzEvent);
+  } else if (m_mouseButton == Qt::LeftButton) {
     TApp::instance()->getCurrentTool()->setToolBusy(true);
     tool->leftButtonDown(pos, toonzEvent);
   }
@@ -531,7 +530,7 @@ void SceneViewer::mouseReleaseEvent(QMouseEvent *event) {
 
   if (m_mouseButton != event->button()) return;
 
-  //reject if tablet was active and the up button is not actually the pen.
+  // reject if tablet was active and the up button is not actually the pen.
   if (m_tabletActive && !m_tabletReleased) return;
   if (m_current3DDevice != NONE) {
     m_mouseButton = Qt::NoButton;
@@ -582,13 +581,13 @@ void SceneViewer::mouseReleaseEvent(QMouseEvent *event) {
 
 quit:
 
-  m_mouseButton = Qt::NoButton;
-  m_tabletEvent = false;
-  m_tabletPressed = false;
-  m_tabletActive = false;
+  m_mouseButton    = Qt::NoButton;
+  m_tabletEvent    = false;
+  m_tabletPressed  = false;
+  m_tabletActive   = false;
   m_tabletReleased = false;
-  m_tabletMove = false;
-  m_pressure    = 0;
+  m_tabletMove     = false;
+  m_pressure       = 0;
 }
 
 //-----------------------------------------------------------------------------
@@ -690,43 +689,43 @@ bool SceneViewer::event(QEvent *e) {
     clock.start();
   }
 
-/*
-switch(e->type())
-{
-case QEvent::Enter:
-qDebug() << "************************** Enter";
-break;
-case QEvent::Leave:
-qDebug() << "************************** Leave";
-break;
-
-case QEvent::TabletPress:
-qDebug() << "************************** TabletPress"  << m_pressure;
-break;
-case QEvent::TabletMove:
-qDebug() << "************************** TabletMove";
-break;
-case QEvent::TabletRelease:
-qDebug() << "************************** TabletRelease";
-break;
-
-
-case QEvent::MouseButtonPress:
-qDebug() << "**************************MouseButtonPress"  << m_pressure << " "
-<< m_tabletEvent;
-break;
-case QEvent::MouseMove:
-qDebug() << "**************************MouseMove" <<  m_pressure;
-break;
-case QEvent::MouseButtonRelease:
-qDebug() << "**************************MouseButtonRelease";
-break;
-
-case QEvent::MouseButtonDblClick:
-qDebug() << "============================== MouseButtonDblClick";
-break;
-}
-*/
+  /*
+  switch(e->type())
+  {
+  case QEvent::Enter:
+  qDebug() << "************************** Enter";
+  break;
+  case QEvent::Leave:
+  qDebug() << "************************** Leave";
+  break;
+
+  case QEvent::TabletPress:
+  qDebug() << "************************** TabletPress"  << m_pressure;
+  break;
+  case QEvent::TabletMove:
+  qDebug() << "************************** TabletMove";
+  break;
+  case QEvent::TabletRelease:
+  qDebug() << "************************** TabletRelease";
+  break;
+
+
+  case QEvent::MouseButtonPress:
+  qDebug() << "**************************MouseButtonPress"  << m_pressure << " "
+  << m_tabletEvent;
+  break;
+  case QEvent::MouseMove:
+  qDebug() << "**************************MouseMove" <<  m_pressure;
+  break;
+  case QEvent::MouseButtonRelease:
+  qDebug() << "**************************MouseButtonRelease";
+  break;
+
+  case QEvent::MouseButtonDblClick:
+  qDebug() << "============================== MouseButtonDblClick";
+  break;
+  }
+  */
 
   return QGLWidget::event(e);
 }