[gimp-help/gimp-help-2-10] Add missing Show Canvas Boundary documentation

[Jacob Boerema <jboerema src gnome org>]

commit d999a9599578bb66bec34904efcac660b9efccbd
Author: Jacob Boerema <jgboerema gmail com>
Date:   Wed Oct 19 13:11:41 2022 -0400

    Add missing  Show Canvas Boundary documentation

 src/menus/view.xml                      |  1 +
 src/menus/view/show-canvas-boundary.xml | 39 +++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
---
diff --git a/src/menus/view.xml b/src/menus/view.xml
index 0607966c9..48ce1acaf 100644
--- a/src/menus/view.xml
+++ b/src/menus/view.xml
@@ -28,6 +28,7 @@
   <xi:include href="view/view-color-management.xml"/>
   <xi:include href="view/show-selection.xml"/>
   <xi:include href="view/show-layer-boundary.xml"/>
+  <xi:include href="view/show-canvas-boundary.xml"/>
   <xi:include href="view/show-guides.xml"/>
   <xi:include href="view/show-grid.xml"/>
   <xi:include href="view/show-sample-points.xml"/>
diff --git a/src/menus/view/show-canvas-boundary.xml b/src/menus/view/show-canvas-boundary.xml
new file mode 100644
index 000000000..3dd3f288a
--- /dev/null
+++ b/src/menus/view/show-canvas-boundary.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE sect2 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+                       "http://www.docbook.org/xml/4.3/docbookx.dtd";>
+<sect2 id="gimp-view-show-canvas-boundary">
+  <title>Show Canvas Boundary</title>
+
+  <indexterm>
+    <primary>Canvas boundary</primary>
+    <secondary>Show/mask canvas boundary</secondary>
+  </indexterm>
+  <indexterm>
+    <primary>Show Canvas Boundary</primary>
+  </indexterm>
+
+  <para>
+    The <guimenuitem>Show Canvas Boundary</guimenuitem> command enables or
+    disables displaying the canvas boundary in the image window.
+  </para>
+  <para>
+    You can set the default for the canvas boundary in the
+    <link linkend="gimp-prefs-image-window">Image Window Appearance</link>
+    dialog.
+  </para>
+
+  <sect3>
+    <title>Activating the Command</title>
+    <itemizedlist>
+      <listitem>
+        <para>
+          You can access this command from the menubar through
+          <menuchoice>
+            <guimenu>View</guimenu>
+            <guimenuitem>Show Canvas Boundary</guimenuitem>
+          </menuchoice>.
+        </para>
+      </listitem>
+    </itemizedlist>
+  </sect3>
+</sect2>