diff --git a/DesignGUI.texinfo b/DesignGUI.texinfo
index dc5cd65..7a4c76c 100644
--- a/DesignGUI.texinfo
+++ b/DesignGUI.texinfo
@@ -59,15 +59,15 @@
 @include chapter-07/contents.texinfo
 @c
 @c=====================================
-@c Apprendices
+@c Appendices
 @c=====================================
-@c Copyrighted document used in the booklet
+@c Copyrights used in the booklet
 @include misc/copyrights.texinfo
 @c List of exercises
 @node The Exercises
 @appendix The Exercises
 @listoffloats Exercise
-@c Solutions of exercises
+@c Solutions to exercises
 @include chapter-50/contents.texinfo
 @c List of examples
 @node The Examples
diff --git a/chapter-01/contents.texinfo b/chapter-01/contents.texinfo
index 4e2c6c3..3bdd158 100644
--- a/chapter-01/contents.texinfo
+++ b/chapter-01/contents.texinfo
@@ -2,7 +2,7 @@
 @chapter Introduction
 
 This booklet is a collection of how-to guides for building basic
-@acronym{GUI, Graphic User Interface} with @cuis{} and its Morphic system.
+@acronym{GUIs, Graphical User Interfaces} with @cuis{} and its Morphic system.
 Some chapters, such as @ref{What is a Morph after all?} and @ref{Design a
 GUI application}, present deeper knowledge. Most chapters can be
 read independently to suit the reader's needs.
diff --git a/chapter-03/contents.texinfo b/chapter-03/contents.texinfo
index 629af2a..eb45119 100644
--- a/chapter-03/contents.texinfo
+++ b/chapter-03/contents.texinfo
@@ -364,7 +364,7 @@ completely dependent on the underlying mathematical models.
 The remaining classes of the kernel morph hierarchy add geometry and visual
 properties. @class{BoxMorph} is the most important one; it is bounded by
 a rectangular extent. It is the root of most sub-morphs used to construct a
-@acronym{GUI, Graphic User Interface}. Indeed, its elements are most often
+@acronym{GUI, Graphical User Interface}. Indeed, its elements are most often
 bounded by a rectangular shape. It allows for significant optimization in
 the rendering of the whole @cuis{} @acronym{GUI}.
 
diff --git a/chapter-04/contents.texinfo b/chapter-04/contents.texinfo
index d010373..97ab44c 100644
--- a/chapter-04/contents.texinfo
+++ b/chapter-04/contents.texinfo
@@ -191,7 +191,7 @@ window
    addMorph: colorButton;
    addMorph: statusLabel;
    openInWorld;
-   morphExtent: (300 @@ window layoutMorph minimumExtent y)}
+   morphExtent: (400 @@ window layoutMorph minimumExtent y)}
 
 Once the button is clicked, we request at runtime the menu with the
 appropriate selection of colors from which to pick an answer.
diff --git a/chapter-05/contents.texinfo b/chapter-05/contents.texinfo
index 018047d..c46892e 100644
--- a/chapter-05/contents.texinfo
+++ b/chapter-05/contents.texinfo
@@ -44,7 +44,7 @@ names@footnote{The book @emph{Smalltalk with Style} is worth reading to write go
 Smalltalk code.}, and each one with a clearly assigned task as well. Ideally, a method
 should not be longer than 10 lines.
 
-With this practice in mind, when it comes to @acronym{GUI, Graphic User
+With this practice in mind, when it comes to @acronym{GUI, Graphical User
 Interface} application development, there is a well-known design pattern:
 @acronym{MVC, Model View Controller} or its alternative @acronym{MVP, Model View
 Presenter}. In this design, the responsibilities are spread across three
diff --git a/misc/copying.texinfo b/misc/copying.texinfo
index 1a3759a..3528363 100644
--- a/misc/copying.texinfo
+++ b/misc/copying.texinfo
@@ -3,7 +3,7 @@
 (@value{cuisVersion}), a free and modern implementation of the
 Smalltalk language and environment.
 
-Copyright @copyright{} 2025 @value{writers}
+Copyright @copyright{} 2025-2026 @value{writers}
 @*
 @thanks{}
 @*
diff --git a/misc/copyrights.texinfo b/misc/copyrights.texinfo
index b36c68d..f4e5bfd 100644
--- a/misc/copyrights.texinfo
+++ b/misc/copyrights.texinfo
@@ -1,6 +1,6 @@
-@c Documents avec copyright
-@node Documents Copyright
-@appendix Documents Copyright
+@c Documents with copyright
+@node Copyrights
+@appendix Copyrights
 
 @noindent
 
diff --git a/misc/settings.texinfo b/misc/settings.texinfo
index 716363c..282e39c 100644
--- a/misc/settings.texinfo
+++ b/misc/settings.texinfo
@@ -1,7 +1,7 @@
 @documentlanguage en
 @documentencoding UTF-8
 @set bookTitle The Morph Book vol. I
-@set bookSubTitle Design Graphic User Interface
+@set bookSubTitle Designing Graphical User Interfaces
 @set cuisVersion 7.0 or later
 @set writers H. Fernandes
 @settitle @value{bookTitle}
@@ -36,7 +36,7 @@ Cuis-Smalltalk
 
 @macro thanks
 @c Alphabetical list of reviewers
-Thanks to Mark Volkmann to share his examples and chapter on layout.
+Thanks to Mark Volkmann for sharing his examples and chapter on layouts.
 @*
 
 Thanks to Ken Dickey, Thiago da Silva Lino, Stephen Smith for the