diff --git a/include/project/board_project_settings.h b/include/project/board_project_settings.h
index 25d7e9e551..20df87c080 100644
--- a/include/project/board_project_settings.h
+++ b/include/project/board_project_settings.h
@@ -87,9 +87,9 @@ struct SELECTION_FILTER_OPTIONS
  */
 enum class HIGH_CONTRAST_MODE
 {
-    NORMAL = 0,     ///< Non-active layers are shown normally (no high-contrast mode)
-    DIMMED,         ///< Non-active layers are dimmed (old high-contrast mode)
-    HIDDEN          ///< Non-active layers are hidden
+    NORMAL = 0,     ///< Inactive layers are shown normally (no high-contrast mode)
+    DIMMED,         ///< Inactive layers are dimmed (old high-contrast mode)
+    HIDDEN          ///< Inactive layers are hidden
 };
 
 ///< Determine how zones should be displayed.
diff --git a/pcbnew/dialogs/panel_setup_layers.cpp b/pcbnew/dialogs/panel_setup_layers.cpp
index 75a2ce3fd8..e8f9368db7 100644
--- a/pcbnew/dialogs/panel_setup_layers.cpp
+++ b/pcbnew/dialogs/panel_setup_layers.cpp
@@ -267,8 +267,7 @@ void PANEL_SETUP_LAYERS::setUserDefinedLayerCheckBoxes()
         bool     state = m_pcb->IsLayerEnabled( layer );
 
 #ifdef HIDE_INACTIVE_LAYERS
-        // This code hides non-active copper layers, or redisplays hidden
-        // layers which are now needed.
+        // This code hides inactive copper layers, or redisplays hidden layers which are now needed.
         PANEL_SETUP_LAYERS_CTLs ctl = getCTLs( layer );
 
         ctl.name->Show( state );
@@ -379,8 +378,7 @@ void PANEL_SETUP_LAYERS::setCopperLayerCheckBoxes( int copperCount )
         bool     state = copperCount > 0;
 
 #ifdef HIDE_INACTIVE_LAYERS
-        // This code hides non-active copper layers, or redisplays hidden
-        // layers which are now needed.
+        // This code hides inactive copper layers, or redisplays hidden layers which are now needed.
         PANEL_SETUP_LAYERS_CTLs ctl = getCTLs( layer );
 
         ctl.name->Show( state );
diff --git a/pcbnew/widgets/appearance_controls.cpp b/pcbnew/widgets/appearance_controls.cpp
index 6ccb4a4058..f5f721bfbe 100644
--- a/pcbnew/widgets/appearance_controls.cpp
+++ b/pcbnew/widgets/appearance_controls.cpp
@@ -572,7 +572,7 @@ void APPEARANCE_CONTROLS::createControls()
     layerDisplayOptionsSizer = new wxBoxSizer( wxVERTICAL );
 
     m_staticTextContrastModeTitle = new wxStaticText( layerDisplayPane, wxID_ANY,
-                                                      _( "Non-active layers:" ), wxDefaultPosition,
+                                                      _( "Inactive layers:" ), wxDefaultPosition,
                                                       wxDefaultSize, 0 );
     m_staticTextContrastModeTitle->Wrap( -1 );
     layerDisplayOptionsSizer->Add( m_staticTextContrastModeTitle, 0,
@@ -584,19 +584,19 @@ void APPEARANCE_CONTROLS::createControls()
     m_rbHighContrastNormal = new wxRadioButton( layerDisplayPane, wxID_ANY, _( "Normal" ),
                                                 wxDefaultPosition, wxDefaultSize, wxRB_GROUP );
     m_rbHighContrastNormal->SetValue( true );
-    m_rbHighContrastNormal->SetToolTip( _( "Non-active layers will be shown in full color" ) );
+    m_rbHighContrastNormal->SetToolTip( _( "Inactive layers will be shown in full color" ) );
 
     contrastModeSizer->Add( m_rbHighContrastNormal, 0, wxRIGHT, 4 );
 
     m_rbHighContrastDim = new wxRadioButton( layerDisplayPane, wxID_ANY, _( "Dim" ),
                                              wxDefaultPosition, wxDefaultSize, 0 );
-    m_rbHighContrastDim->SetToolTip( _( "Non-active layers will be dimmed" ) );
+    m_rbHighContrastDim->SetToolTip( _( "Inactive layers will be dimmed" ) );
 
     contrastModeSizer->Add( m_rbHighContrastDim, 0, wxRIGHT | wxLEFT, 10 );
 
     m_rbHighContrastOff = new wxRadioButton( layerDisplayPane, wxID_ANY, _( "Hide" ),
                                              wxDefaultPosition, wxDefaultSize, 0 );
-    m_rbHighContrastOff->SetToolTip( _( "Non-active layers will be hidden" ) );
+    m_rbHighContrastOff->SetToolTip( _( "Inactive layers will be hidden" ) );
 
     contrastModeSizer->Add( m_rbHighContrastOff, 0, 0, 5 );