diff --git a/doc/class_template.h b/doc/class_template.h
index a4215202..12c19272 100644
--- a/doc/class_template.h
+++ b/doc/class_template.h
@@ -62,7 +62,7 @@ class FClassName
     // Destructor
     ~FClassName();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FClassName& operator = (const FClassName&) = delete;
 
     // Overloaded operators
diff --git a/examples/background-color.cpp b/examples/background-color.cpp
index 37b4670b..c4411203 100644
--- a/examples/background-color.cpp
+++ b/examples/background-color.cpp
@@ -49,7 +49,7 @@ class Background final : public finalcut::FDialog
     // Destructor
     ~Background();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Background& operator = (const Background&) = delete;
 
   private:
diff --git a/examples/checklist.cpp b/examples/checklist.cpp
index 65380a59..a2fd7a69 100644
--- a/examples/checklist.cpp
+++ b/examples/checklist.cpp
@@ -48,7 +48,7 @@ class CheckList final : public finalcut::FDialog
     // Destructor
     ~CheckList() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     CheckList& operator = (const CheckList&) = delete;
 
   private:
diff --git a/examples/listbox.cpp b/examples/listbox.cpp
index 332a0c12..14b3f8b8 100644
--- a/examples/listbox.cpp
+++ b/examples/listbox.cpp
@@ -88,7 +88,7 @@ class Listbox final : public FDialog
     // Destructor
     ~Listbox() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Listbox& operator = (const Listbox&) = delete;
 
   private:
diff --git a/examples/listview.cpp b/examples/listview.cpp
index 58409f95..d2dea7a6 100644
--- a/examples/listview.cpp
+++ b/examples/listview.cpp
@@ -48,7 +48,7 @@ class Listview final : public finalcut::FDialog
     // Destructor
     ~Listview() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Listview& operator = (const Listview&) = delete;
 
   private:
diff --git a/examples/menu.cpp b/examples/menu.cpp
index 613422aa..c043db21 100644
--- a/examples/menu.cpp
+++ b/examples/menu.cpp
@@ -43,7 +43,7 @@ class Menu final : public finalcut::FDialog
     // Destructor
     ~Menu() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Menu& operator = (const Menu&) = delete;
 
   private:
diff --git a/examples/mouse.cpp b/examples/mouse.cpp
index f4e2f217..5189db9c 100644
--- a/examples/mouse.cpp
+++ b/examples/mouse.cpp
@@ -45,7 +45,7 @@ class ColorChooser final : public finalcut::FWidget
     // Destructor
     ~ColorChooser() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     ColorChooser& operator = (const ColorChooser&) = delete;
 
     // Accessors
@@ -184,7 +184,7 @@ class Brushes final : public finalcut::FWidget
     // Destructor
     ~Brushes() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Brushes& operator = (const Brushes&) = delete;
 
     // Accessor
@@ -323,7 +323,7 @@ class MouseDraw final : public finalcut::FDialog
     // Destructor
     ~MouseDraw() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     MouseDraw& operator = (const MouseDraw&) = delete;
 
     // Methods
diff --git a/examples/scrollview.cpp b/examples/scrollview.cpp
index 7fa52cde..d9ffb32f 100644
--- a/examples/scrollview.cpp
+++ b/examples/scrollview.cpp
@@ -43,7 +43,7 @@ class Scrollview final : public finalcut::FScrollView
     // Destructor
     ~Scrollview() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Scrollview& operator = (const Scrollview&) = delete;
 
     // Mutator
diff --git a/examples/term-attributes.cpp b/examples/term-attributes.cpp
index 0a51b62c..f601c3b0 100644
--- a/examples/term-attributes.cpp
+++ b/examples/term-attributes.cpp
@@ -46,7 +46,7 @@ class AttribDlg final : public finalcut::FDialog
     // Destructor
     ~AttribDlg() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     AttribDlg& operator = (const AttribDlg&) = delete;
 
     // Methods
diff --git a/examples/transparent.cpp b/examples/transparent.cpp
index 01bca28f..f34ebe2a 100644
--- a/examples/transparent.cpp
+++ b/examples/transparent.cpp
@@ -54,7 +54,7 @@ class Transparent final : public finalcut::FDialog
     // Destructor
     ~Transparent() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Transparent& operator = (const Transparent&) = delete;
 
   private:
@@ -152,7 +152,7 @@ class MainWindow final : public finalcut::FDialog
     // Destructor
     ~MainWindow() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     MainWindow& operator = (const MainWindow&) = delete;
 
   private:
diff --git a/examples/treeview.cpp b/examples/treeview.cpp
index d83e8672..71c014c8 100644
--- a/examples/treeview.cpp
+++ b/examples/treeview.cpp
@@ -131,7 +131,7 @@ class Treeview final : public finalcut::FDialog
     // Destructor
     ~Treeview() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Treeview& operator = (const Treeview&) = delete;
 
   private:
diff --git a/examples/ui.cpp b/examples/ui.cpp
index 80a3d740..2a68c9c3 100644
--- a/examples/ui.cpp
+++ b/examples/ui.cpp
@@ -50,7 +50,7 @@ class ProgressDialog final : public finalcut::FDialog
     // Destructor
     ~ProgressDialog() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     ProgressDialog& operator = (const ProgressDialog&) = delete;
 
   private:
@@ -193,7 +193,7 @@ class TextWindow final : public finalcut::FDialog
     // Destructor
     ~TextWindow() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     TextWindow& operator = (const TextWindow&) = delete;
 
     // Method
@@ -259,7 +259,7 @@ class MyDialog final : public finalcut::FDialog
     // Destructor
     ~MyDialog() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     MyDialog& operator = (const MyDialog&) = delete;
 
   private:
diff --git a/examples/watch.cpp b/examples/watch.cpp
index 77b98744..d6fab591 100644
--- a/examples/watch.cpp
+++ b/examples/watch.cpp
@@ -43,7 +43,7 @@ class Watch final : public finalcut::FDialog
     // Destructor
     ~Watch() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Watch& operator = (const Watch&) = delete;
 
     // Method
diff --git a/examples/windows.cpp b/examples/windows.cpp
index e4d4764d..b85a076d 100644
--- a/examples/windows.cpp
+++ b/examples/windows.cpp
@@ -44,7 +44,7 @@ class SmallWindow final : public finalcut::FDialog
     // Destructor
     ~SmallWindow() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     SmallWindow& operator = (const SmallWindow&) = delete;
 
   private:
@@ -172,7 +172,7 @@ class Window final : public finalcut::FDialog
     // Destructor
     ~Window() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     Window& operator = (const Window&) = delete;
 
   private:
@@ -187,7 +187,7 @@ class Window final : public finalcut::FDialog
         // Disable copy constructor
         win_data (const win_data&) = delete;
 
-        // Disable assignment operator (=)
+        // Disable copy assignment operator (=)
         win_data& operator = (const win_data&) = delete;
 
         // Data members
diff --git a/src/include/final/emptyfstring.h b/src/include/final/emptyfstring.h
index b8183cd5..6d2beb0f 100644
--- a/src/include/final/emptyfstring.h
+++ b/src/include/final/emptyfstring.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2015-2019 Markus Gans                                      *
+* Copyright 2015-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -48,7 +48,7 @@ public:
   // Disable copy constructor
   emptyFString (const emptyFString&) = delete;
 
-  // Disable assignment operator (=)
+  // Disable copy assignment operator (=)
   emptyFString& operator = (const emptyFString&) = delete;
 
   static bool isNull();
diff --git a/src/include/final/fapplication.h b/src/include/final/fapplication.h
index cbcb4439..c0f768dd 100644
--- a/src/include/final/fapplication.h
+++ b/src/include/final/fapplication.h
@@ -98,7 +98,7 @@ class FApplication : public FWidget
     // Destructor
     ~FApplication() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FApplication& operator = (const FApplication&) = delete;
 
     // Accessors
diff --git a/src/include/final/fbutton.h b/src/include/final/fbutton.h
index f365ade7..07e485fe 100644
--- a/src/include/final/fbutton.h
+++ b/src/include/final/fbutton.h
@@ -70,7 +70,7 @@ class FButton : public FWidget
     // Destructor
     ~FButton() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FButton& operator = (const FButton&) = delete;
 
     // Overloaded operator
diff --git a/src/include/final/fbuttongroup.h b/src/include/final/fbuttongroup.h
index d4aea0f4..33b95d77 100644
--- a/src/include/final/fbuttongroup.h
+++ b/src/include/final/fbuttongroup.h
@@ -74,7 +74,7 @@ class FButtonGroup : public FScrollView
     // Destructor
     ~FButtonGroup() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FButtonGroup& operator = (const FButtonGroup&) = delete;
 
     // Accessor
diff --git a/src/include/final/fcheckbox.h b/src/include/final/fcheckbox.h
index 6039ebab..132f4c68 100644
--- a/src/include/final/fcheckbox.h
+++ b/src/include/final/fcheckbox.h
@@ -74,7 +74,7 @@ class FCheckBox : public FToggleButton
     // Destructor
     ~FCheckBox() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FCheckBox& operator = (const FCheckBox&) = delete;
 
     // Accessor
diff --git a/src/include/final/fcheckmenuitem.h b/src/include/final/fcheckmenuitem.h
index e380c756..e7e006ec 100644
--- a/src/include/final/fcheckmenuitem.h
+++ b/src/include/final/fcheckmenuitem.h
@@ -74,7 +74,7 @@ class FCheckMenuItem : public FMenuItem
     // Destructor
     ~FCheckMenuItem() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FCheckMenuItem& operator = (const FCheckMenuItem&) = delete;
 
     // Accessor
diff --git a/src/include/final/fcolorpair.h b/src/include/final/fcolorpair.h
index 331a6247..1b60833d 100644
--- a/src/include/final/fcolorpair.h
+++ b/src/include/final/fcolorpair.h
@@ -64,7 +64,7 @@ class FColorPair
     // Destructor
     ~FColorPair() = default;
 
-    // Assignment operator (=)
+    // copy assignment operator (=)
     FColorPair& operator = (const FColorPair& pair)
     {
       fg_color = pair.fg_color;
diff --git a/src/include/final/fcombobox.h b/src/include/final/fcombobox.h
index de16d515..ac72195a 100644
--- a/src/include/final/fcombobox.h
+++ b/src/include/final/fcombobox.h
@@ -79,7 +79,7 @@ class FDropDownListBox : public FWindow
     // Destructor
     ~FDropDownListBox () override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FDropDownListBox& operator = (const FDropDownListBox&) = delete;
 
     // Accessors
@@ -141,7 +141,7 @@ class FComboBox : public FWidget
     // Destructor
     ~FComboBox() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FComboBox& operator = (const FComboBox&) = delete;
 
     // Overloaded operators
diff --git a/src/include/final/fdialog.h b/src/include/final/fdialog.h
index 67c102f2..bdfc6458 100644
--- a/src/include/final/fdialog.h
+++ b/src/include/final/fdialog.h
@@ -87,7 +87,7 @@ class FDialog : public FWindow
     // Destructor
     ~FDialog() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FDialog& operator = (const FDialog&) = delete;
 
     // Accessors
diff --git a/src/include/final/fdialoglistmenu.h b/src/include/final/fdialoglistmenu.h
index 16fc24c8..58acbdd0 100644
--- a/src/include/final/fdialoglistmenu.h
+++ b/src/include/final/fdialoglistmenu.h
@@ -80,7 +80,7 @@ class FDialogListMenu : public FMenu
     // Destructor
     ~FDialogListMenu() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FDialogListMenu& operator = (const FDialogListMenu&) = delete;
 
     // Accessors
diff --git a/src/include/final/fevent.h b/src/include/final/fevent.h
index 8be6e58a..1627ae0e 100644
--- a/src/include/final/fevent.h
+++ b/src/include/final/fevent.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2014-2019 Markus Gans                                      *
+* Copyright 2014-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -330,7 +330,7 @@ class FUserEvent : public FEvent  // timer event
 
     ~FUserEvent();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FUserEvent& operator = (const FUserEvent&) = delete;
 
     int      getUserId() const;
diff --git a/src/include/final/ffiledialog.h b/src/include/final/ffiledialog.h
index 97bb8483..321f254c 100644
--- a/src/include/final/ffiledialog.h
+++ b/src/include/final/ffiledialog.h
@@ -108,7 +108,7 @@ class FFileDialog : public FDialog
     // Destructor
     ~FFileDialog() override;
 
-    // Assignment operator (=)
+    // copy assignment operator (=)
     FFileDialog& operator = (const FFileDialog&);
 
     // Accessors
diff --git a/src/include/final/fkeyboard.h b/src/include/final/fkeyboard.h
index 6deda4f2..9dca7e56 100644
--- a/src/include/final/fkeyboard.h
+++ b/src/include/final/fkeyboard.h
@@ -95,7 +95,7 @@ class FKeyboard final
     // Destructor
     ~FKeyboard();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FKeyboard& operator = (const FKeyboard&) = delete;
 
     // Accessors
diff --git a/src/include/final/flabel.h b/src/include/final/flabel.h
index 735e81da..52286415 100644
--- a/src/include/final/flabel.h
+++ b/src/include/final/flabel.h
@@ -75,7 +75,7 @@ class FLabel : public FWidget
     // Destructor
     ~FLabel() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FLabel& operator = (const FLabel&) = delete;
 
     // Overloaded operators
diff --git a/src/include/final/flineedit.h b/src/include/final/flineedit.h
index 1c35a570..e756c064 100644
--- a/src/include/final/flineedit.h
+++ b/src/include/final/flineedit.h
@@ -91,7 +91,7 @@ class FLineEdit : public FWidget
     // Destructor
     ~FLineEdit() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FLineEdit& operator = (const FLineEdit&) = delete;
 
     // Overloaded operators
diff --git a/src/include/final/flistbox.h b/src/include/final/flistbox.h
index e1516e4a..e2a71688 100644
--- a/src/include/final/flistbox.h
+++ b/src/include/final/flistbox.h
@@ -77,7 +77,7 @@ class FListBoxItem
     // Destructor
     virtual ~FListBoxItem();
 
-    // Assignment operator (=)
+    // copy copy assignment operator (=)
     FListBoxItem& operator = (const FListBoxItem&);
 
     // Accessors
@@ -156,7 +156,7 @@ class FListBox : public FWidget
     // Destructor
     ~FListBox() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FListBox& operator = (const FListBox&) = delete;
 
     // Accessors
diff --git a/src/include/final/flistview.h b/src/include/final/flistview.h
index 6a388f2f..f9c3a970 100644
--- a/src/include/final/flistview.h
+++ b/src/include/final/flistview.h
@@ -80,7 +80,7 @@ class FListViewItem : public FObject
     // Destructor
     ~FListViewItem() override;
 
-    // Assignment operator (=)
+    // copy assignment operator (=)
     FListViewItem& operator = (const FListViewItem&);
 
     // Accessors
@@ -274,7 +274,7 @@ class FListView : public FWidget
     // Destructor
     ~FListView() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FListView& operator = (const FListView&) = delete;
 
     // Accessors
diff --git a/src/include/final/fmenu.h b/src/include/final/fmenu.h
index b6c72cb0..5ccef631 100644
--- a/src/include/final/fmenu.h
+++ b/src/include/final/fmenu.h
@@ -81,7 +81,7 @@ class FMenu : public FWindow, public FMenuList
     // Destructor
     ~FMenu() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FMenu& operator = (const FMenu&) = delete;
 
     // Accessors
diff --git a/src/include/final/fmenubar.h b/src/include/final/fmenubar.h
index 8ea39199..bf1e81d5 100644
--- a/src/include/final/fmenubar.h
+++ b/src/include/final/fmenubar.h
@@ -79,7 +79,7 @@ class FMenuBar : public FWindow, public FMenuList
     // Destructor
     ~FMenuBar() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FMenuBar& operator = (const FMenuBar&) = delete;
 
     // Accessors
diff --git a/src/include/final/fmenuitem.h b/src/include/final/fmenuitem.h
index 17b501b2..68619a5e 100644
--- a/src/include/final/fmenuitem.h
+++ b/src/include/final/fmenuitem.h
@@ -84,7 +84,7 @@ class FMenuItem : public FWidget
     // Destructor
     ~FMenuItem() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FMenuItem& operator = (const FMenuItem&) = delete;
 
     // Accessors
diff --git a/src/include/final/fmenulist.h b/src/include/final/fmenulist.h
index 3ce66a41..bb8c9288 100644
--- a/src/include/final/fmenulist.h
+++ b/src/include/final/fmenulist.h
@@ -67,7 +67,7 @@ class FMenuList
     // Destructor
     virtual ~FMenuList();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FMenuList& operator = (const FMenuList&) = delete;
 
     // Accessors
diff --git a/src/include/final/fmessagebox.h b/src/include/final/fmessagebox.h
index 053f0dbf..da0ae501 100644
--- a/src/include/final/fmessagebox.h
+++ b/src/include/final/fmessagebox.h
@@ -97,7 +97,7 @@ class FMessageBox : public FDialog
     // Destructor
     ~FMessageBox() override;
 
-    // Assignment operator (=)
+    // copy assignment operator (=)
     FMessageBox& operator = (const FMessageBox&);
 
     // Accessor
diff --git a/src/include/final/fmouse.h b/src/include/final/fmouse.h
index 1f30c187..76a65fb2 100644
--- a/src/include/final/fmouse.h
+++ b/src/include/final/fmouse.h
@@ -454,7 +454,7 @@ class FMouseControl
     // Destructor
     virtual ~FMouseControl();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FMouseControl& operator = (const FMouseControl&) = delete;
 
     // Accessors
diff --git a/src/include/final/fobject.h b/src/include/final/fobject.h
index ff6ecf91..2bab65e4 100644
--- a/src/include/final/fobject.h
+++ b/src/include/final/fobject.h
@@ -85,7 +85,7 @@ class FObject
     // Destructor
     virtual ~FObject();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FObject& operator = (const FObject&) = delete;
 
     // Accessors
diff --git a/src/include/final/foptiattr.h b/src/include/final/foptiattr.h
index ac7ca525..55e04477 100644
--- a/src/include/final/foptiattr.h
+++ b/src/include/final/foptiattr.h
@@ -123,7 +123,7 @@ class FOptiAttr final
     // Destructor
     ~FOptiAttr();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FOptiAttr& operator = (const FOptiAttr&) = delete;
 
     // Accessors
diff --git a/src/include/final/fradiobutton.h b/src/include/final/fradiobutton.h
index c72551e1..10cebb5b 100644
--- a/src/include/final/fradiobutton.h
+++ b/src/include/final/fradiobutton.h
@@ -74,7 +74,7 @@ class FRadioButton : public FToggleButton
     // Destructor
     ~FRadioButton() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FRadioButton& operator = (const FRadioButton&) = delete;
 
     // Accessor
diff --git a/src/include/final/fradiomenuitem.h b/src/include/final/fradiomenuitem.h
index fb80dea0..ad14547c 100644
--- a/src/include/final/fradiomenuitem.h
+++ b/src/include/final/fradiomenuitem.h
@@ -74,7 +74,7 @@ class FRadioMenuItem : public FMenuItem
     // Destructor
     ~FRadioMenuItem() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FRadioMenuItem& operator = (const FRadioMenuItem&) = delete;
 
     // Accessor
diff --git a/src/include/final/fscrollbar.h b/src/include/final/fscrollbar.h
index d59a523d..61eb4635 100644
--- a/src/include/final/fscrollbar.h
+++ b/src/include/final/fscrollbar.h
@@ -94,7 +94,7 @@ class FScrollbar : public FWidget
     // Destructor
     ~FScrollbar() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FScrollbar& operator = (const FScrollbar&) = delete;
 
     // Accessors
diff --git a/src/include/final/fscrollview.h b/src/include/final/fscrollview.h
index 610e42f1..bbe2d764 100644
--- a/src/include/final/fscrollview.h
+++ b/src/include/final/fscrollview.h
@@ -76,7 +76,7 @@ class FScrollView : public FWidget
     // Destructor
     ~FScrollView() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FScrollView& operator = (const FScrollView&) = delete;
 
     // Accessors
diff --git a/src/include/final/fspinbox.h b/src/include/final/fspinbox.h
index 517ec632..42384843 100644
--- a/src/include/final/fspinbox.h
+++ b/src/include/final/fspinbox.h
@@ -74,7 +74,7 @@ class FSpinBox : public FWidget
     // Destructor
     ~FSpinBox() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FSpinBox& operator = (const FSpinBox&) = delete;
 
     // Accessors
diff --git a/src/include/final/fstartoptions.h b/src/include/final/fstartoptions.h
index 21277f6a..af377ca1 100644
--- a/src/include/final/fstartoptions.h
+++ b/src/include/final/fstartoptions.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2019 Markus Gans                                           *
+* Copyright 2019-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -60,7 +60,7 @@ class FStartOptions final
     // Destructor
     ~FStartOptions();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FStartOptions& operator = (const FStartOptions&) = delete;
 
     // Accessors
diff --git a/src/include/final/fstatusbar.h b/src/include/final/fstatusbar.h
index b6ce8d55..90a93bec 100644
--- a/src/include/final/fstatusbar.h
+++ b/src/include/final/fstatusbar.h
@@ -83,7 +83,7 @@ class FStatusKey : public FWidget
     // Destructor
     ~FStatusKey() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FStatusKey& operator = (const FStatusKey&) = delete;
 
     // Accessors
@@ -192,7 +192,7 @@ class FStatusBar : public FWindow
     // Destructor
     ~FStatusBar() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FStatusBar& operator = (const FStatusBar&) = delete;
 
     // Accessors
diff --git a/src/include/final/fstyle.h b/src/include/final/fstyle.h
index 68befd40..d5c26a8d 100644
--- a/src/include/final/fstyle.h
+++ b/src/include/final/fstyle.h
@@ -62,7 +62,7 @@ class FStyle
     // Destructor
     ~FStyle() = default;
 
-    // Assignment operator (=)
+    // copy assignment operator (=)
     FStyle& operator = (const FStyle& style)
     {
       attribute = style.attribute;
diff --git a/src/include/final/fswitch.h b/src/include/final/fswitch.h
index a9cfb3f9..00ee64a4 100644
--- a/src/include/final/fswitch.h
+++ b/src/include/final/fswitch.h
@@ -74,7 +74,7 @@ class FSwitch : public FToggleButton
     // Destructor
     ~FSwitch() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FSwitch& operator = (const FSwitch&) = delete;
 
     // Accessor
diff --git a/src/include/final/fterm.h b/src/include/final/fterm.h
index 71ba0725..876d1251 100644
--- a/src/include/final/fterm.h
+++ b/src/include/final/fterm.h
@@ -169,7 +169,7 @@ class FTerm final
     // Destructor
     ~FTerm();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTerm& operator = (const FTerm&) = delete;
 
     // Accessors
diff --git a/src/include/final/ftermdata.h b/src/include/final/ftermdata.h
index d3adeab3..c36580ab 100644
--- a/src/include/final/ftermdata.h
+++ b/src/include/final/ftermdata.h
@@ -67,7 +67,7 @@ class FTermData final
     ~FTermData()
     { }
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermData& operator = (const FTermData&) = delete;
 
     // Accessors
diff --git a/src/include/final/ftermdebugdata.h b/src/include/final/ftermdebugdata.h
index 3bbebac2..94870964 100644
--- a/src/include/final/ftermdebugdata.h
+++ b/src/include/final/ftermdebugdata.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2018-2019 Markus Gans                                      *
+* Copyright 2018-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -60,7 +60,7 @@ class FTermDebugData final
     // Destructor
     ~FTermDebugData() = default;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermDebugData& operator = (const FTermDebugData&) = delete;
 
     // Accessors
diff --git a/src/include/final/ftermdetection.h b/src/include/final/ftermdetection.h
index a597da10..f697b4ff 100644
--- a/src/include/final/ftermdetection.h
+++ b/src/include/final/ftermdetection.h
@@ -87,7 +87,7 @@ class FTermDetection final
     // Destructor
     ~FTermDetection();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermDetection& operator = (const FTermDetection&) = delete;
 
     // Accessor
diff --git a/src/include/final/ftermfreebsd.h b/src/include/final/ftermfreebsd.h
index 06bb3020..da7aaf08 100644
--- a/src/include/final/ftermfreebsd.h
+++ b/src/include/final/ftermfreebsd.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2018-2019 Markus Gans                                      *
+* Copyright 2018-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -91,7 +91,7 @@ class FTermFreeBSD final
     // Destructor
     ~FTermFreeBSD() = default;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermFreeBSD& operator = (const FTermFreeBSD&) = delete;
 
     // Accessors
diff --git a/src/include/final/ftermlinux.h b/src/include/final/ftermlinux.h
index 33c24287..9e71d5bc 100644
--- a/src/include/final/ftermlinux.h
+++ b/src/include/final/ftermlinux.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2018-2019 Markus Gans                                      *
+* Copyright 2018-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -89,7 +89,7 @@ class FTermLinux final
     // Destructor
     ~FTermLinux();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermLinux& operator = (const FTermLinux&) = delete;
 
     // Accessors
diff --git a/src/include/final/ftermopenbsd.h b/src/include/final/ftermopenbsd.h
index 331699a2..91c530c0 100644
--- a/src/include/final/ftermopenbsd.h
+++ b/src/include/final/ftermopenbsd.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2018-2019 Markus Gans                                      *
+* Copyright 2018-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -83,7 +83,7 @@ class FTermOpenBSD final
     // Destructor
     ~FTermOpenBSD();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermOpenBSD& operator = (const FTermOpenBSD&) = delete;
 
     // Accessor
diff --git a/src/include/final/ftermxterminal.h b/src/include/final/ftermxterminal.h
index 196b10d4..8328df8a 100644
--- a/src/include/final/ftermxterminal.h
+++ b/src/include/final/ftermxterminal.h
@@ -3,7 +3,7 @@
 *                                                                      *
 * This file is part of the Final Cut widget toolkit                    *
 *                                                                      *
-* Copyright 2018-2019 Markus Gans                                      *
+* Copyright 2018-2020 Markus Gans                                      *
 *                                                                      *
 * The Final Cut is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public License   *
@@ -59,7 +59,7 @@ class FTermXTerminal final
     // Destructor
     ~FTermXTerminal();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermXTerminal& operator = (const FTermXTerminal&) = delete;
 
     // Mutators
diff --git a/src/include/final/ftextview.h b/src/include/final/ftextview.h
index bc651b2e..d968a8d4 100644
--- a/src/include/final/ftextview.h
+++ b/src/include/final/ftextview.h
@@ -78,7 +78,7 @@ class FTextView : public FWidget
     // Destructor
     ~FTextView() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTextView& operator = (const FTextView&) = delete;
 
     // Overloaded operators
diff --git a/src/include/final/ftogglebutton.h b/src/include/final/ftogglebutton.h
index 2df91f57..2531c5ee 100644
--- a/src/include/final/ftogglebutton.h
+++ b/src/include/final/ftogglebutton.h
@@ -75,7 +75,7 @@ class FToggleButton : public FWidget
     // Destructor
     ~FToggleButton() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FToggleButton& operator = (const FToggleButton&) = delete;
 
     // Accessors
diff --git a/src/include/final/ftooltip.h b/src/include/final/ftooltip.h
index c88029bc..6800927f 100644
--- a/src/include/final/ftooltip.h
+++ b/src/include/final/ftooltip.h
@@ -76,7 +76,7 @@ class FToolTip : public FWindow
     // Destructor
     ~FToolTip () override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FToolTip& operator = (const FToolTip&) = delete;
 
     // Accessors
diff --git a/src/include/final/fvterm.h b/src/include/final/fvterm.h
index 8fa5b21c..c6d078b4 100644
--- a/src/include/final/fvterm.h
+++ b/src/include/final/fvterm.h
@@ -126,7 +126,7 @@ class FVTerm
     // Destructor
     virtual ~FVTerm();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FVTerm& operator = (const FVTerm&) = delete;
 
     // Overloaded operators
@@ -519,7 +519,7 @@ struct FVTerm::FTermArea  // define virtual terminal character properties
     // Destructor
     ~FTermArea() = default;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FTermArea& operator = (const FTermArea&) = delete;
 
     // Data members
diff --git a/src/include/final/fwidget.h b/src/include/final/fwidget.h
index 2e38244f..a546ca4e 100644
--- a/src/include/final/fwidget.h
+++ b/src/include/final/fwidget.h
@@ -180,7 +180,7 @@ class FWidget : public FVTerm, public FObject
     // Destructor
     ~FWidget() override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FWidget& operator = (const FWidget&) = delete;
 
     // Accessors
diff --git a/src/include/final/fwindow.h b/src/include/final/fwindow.h
index b9b8ee39..572e4530 100644
--- a/src/include/final/fwindow.h
+++ b/src/include/final/fwindow.h
@@ -79,7 +79,7 @@ class FWindow : public FWidget
     // Destructor
     ~FWindow () override;
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     FWindow& operator = (const FWindow&) = delete;
 
     // Accessors
diff --git a/src/include/final/sgr_optimizer.h b/src/include/final/sgr_optimizer.h
index e0d6814f..0b69ed53 100644
--- a/src/include/final/sgr_optimizer.h
+++ b/src/include/final/sgr_optimizer.h
@@ -62,7 +62,7 @@ class SGRoptimizer final
     // Destructor
     ~SGRoptimizer();
 
-    // Disable assignment operator (=)
+    // Disable copy assignment operator (=)
     SGRoptimizer& operator = (const SGRoptimizer&) = delete;
 
     // Method