diff --git a/gerbview/events_called_functions.cpp b/gerbview/events_called_functions.cpp
index 3708c96f8c..46ae0cee36 100644
--- a/gerbview/events_called_functions.cpp
+++ b/gerbview/events_called_functions.cpp
@@ -65,10 +65,6 @@ BEGIN_EVENT_TABLE( GERBVIEW_FRAME, EDA_DRAW_FRAME )
 
     EVT_SELECT_DCODE( ID_TOOLBARH_GERBER_SELECT_ACTIVE_DCODE, GERBVIEW_FRAME::OnSelectActiveDCode )
 
-    // Option toolbar
-    EVT_TOOL_RANGE( ID_TB_OPTIONS_SHOW_GBR_MODE_0, ID_TB_OPTIONS_SHOW_GBR_MODE_2,
-                    GERBVIEW_FRAME::OnSelectDisplayMode )
-
     // Auxiliary horizontal toolbar
     EVT_CHOICE( ID_GBR_AUX_TOOLBAR_PCB_CMP_CHOICE, GERBVIEW_FRAME::OnSelectHighlightChoice )
     EVT_CHOICE( ID_GBR_AUX_TOOLBAR_PCB_NET_CHOICE, GERBVIEW_FRAME::OnSelectHighlightChoice )
@@ -81,8 +77,6 @@ BEGIN_EVENT_TABLE( GERBVIEW_FRAME, EDA_DRAW_FRAME )
     EVT_UPDATE_UI( ID_TOOLBARH_GERBER_SELECT_ACTIVE_DCODE, GERBVIEW_FRAME::OnUpdateSelectDCode )
     EVT_UPDATE_UI( ID_TOOLBARH_GERBVIEW_SELECT_ACTIVE_LAYER,
                    GERBVIEW_FRAME::OnUpdateLayerSelectBox )
-    EVT_UPDATE_UI_RANGE( ID_TB_OPTIONS_SHOW_GBR_MODE_0, ID_TB_OPTIONS_SHOW_GBR_MODE_2,
-                         GERBVIEW_FRAME::OnUpdateDrawMode )
 
     // Drop files event
     EVT_DROP_FILES( GERBVIEW_FRAME::OnDropFiles )
@@ -151,19 +145,6 @@ void GERBVIEW_FRAME::OnSelectActiveLayer( wxCommandEvent& event )
 }
 
 
-void GERBVIEW_FRAME::OnSelectDisplayMode( wxCommandEvent& event )
-{
-    switch( event.GetId() )
-    {
-    case ID_TB_OPTIONS_SHOW_GBR_MODE_0: SetDisplayMode( 0 ); break;
-    case ID_TB_OPTIONS_SHOW_GBR_MODE_1: SetDisplayMode( 1 ); break;
-    case ID_TB_OPTIONS_SHOW_GBR_MODE_2: SetDisplayMode( 2 ); break;
-    }
-
-    GetCanvas()->Refresh();
-}
-
-
 void GERBVIEW_FRAME::OnQuit( wxCommandEvent& event )
 {
     Close( true );
diff --git a/gerbview/gerbview_frame.cpp b/gerbview/gerbview_frame.cpp
index 176d248d61..cef9f759d2 100644
--- a/gerbview/gerbview_frame.cpp
+++ b/gerbview/gerbview_frame.cpp
@@ -85,7 +85,6 @@ GERBVIEW_FRAME::GERBVIEW_FRAME( KIWAY* aKiway, wxWindow* aParent )
     m_netText = nullptr;
     m_apertText = nullptr;
     m_dcodeText = nullptr;
-    m_displayMode = 0;
     m_aboutTitle = _HKI( "KiCad Gerber Viewer" );
 
     SHAPE_POLY_SET dummy;   // A ugly trick to force the linker to include
diff --git a/gerbview/gerbview_frame.h b/gerbview/gerbview_frame.h
index 96ab216473..522d4b3d57 100644
--- a/gerbview/gerbview_frame.h
+++ b/gerbview/gerbview_frame.h
@@ -94,20 +94,6 @@ public:
     /// Updates the GAL with display settings changes
     void ApplyDisplaySettingsToGAL();
 
-    /**
-     * @return 0 for fast mode (not fully compatible with negative objects)
-     *         1 for exact mode, write mode
-     *         2 for exact mode, OR mode (transparency mode)
-     */
-    int GetDisplayMode() { return m_displayMode; }
-
-    /**
-     * @param aMode =  0 for fast mode
-     *                 1 for exact mode, write mode
-     *                 2 for exact mode, OR mode (transparency mode)
-     */
-    void SetDisplayMode( int aMode ) { m_displayMode = aMode; }
-
     /**
      * Test whether a given element category is visible. Keep this as an inline function.
      *
@@ -532,16 +518,6 @@ protected:
                                                 // user.
 
 private:
-    int             m_displayMode;      // Gerber images ("layers" in Gerbview) can be drawn:
-                                        // - in fast mode (write mode) but if there are negative
-                                        // items only the last image is correctly drawn (no
-                                        // problem to see only one image or when no negative items)
-                                        // - in "exact" mode (but slower) in write mode:
-                                        // last image covers previous images
-                                        // - in "exact" mode (also slower) in OR mode
-                                        // (transparency mode)
-                                        // m_displayMode = 0, 1 or 2
-
     bool                m_show_layer_manager_tools;
 
     GBR_LAYOUT*         m_gerberLayout;
diff --git a/gerbview/toolbars_gerber.cpp b/gerbview/toolbars_gerber.cpp
index 3b20605980..5a1d106e89 100644
--- a/gerbview/toolbars_gerber.cpp
+++ b/gerbview/toolbars_gerber.cpp
@@ -471,18 +471,6 @@ void GERBVIEW_FRAME::updateAperAttributesSelectBox()
 }
 
 
-void GERBVIEW_FRAME::OnUpdateDrawMode( wxUpdateUIEvent& aEvent )
-{
-    switch( aEvent.GetId() )
-    {
-    case ID_TB_OPTIONS_SHOW_GBR_MODE_0: aEvent.Check( GetDisplayMode() == 0 ); break;
-    case ID_TB_OPTIONS_SHOW_GBR_MODE_1: aEvent.Check( GetDisplayMode() == 1 ); break;
-    case ID_TB_OPTIONS_SHOW_GBR_MODE_2: aEvent.Check( GetDisplayMode() == 2 ); break;
-    default:                                                                   break;
-    }
-}
-
-
 void GERBVIEW_FRAME::OnUpdateSelectDCode( wxUpdateUIEvent& aEvent )
 {
     if( !m_DCodeSelector )