[gnome-boxes/add-edit-xml-docs] help: Add instructions to edit libvirt domain XML of a box

[Felipe Borges <felipeborges src gnome org>]

commit 16b4334200985e539c7f40b64f57fd52a61cd4cd
Author: Felipe Borges <felipeborges gnome org>
Date:   Wed Mar 10 10:57:46 2021 +0100

    help: Add instructions to edit libvirt domain XML of a box
    
    See https://gitlab.gnome.org/GNOME/gnome-boxes/-/merge_requests/350
    See also https://libvirt.org/format.html
    
    Fixes #611

 help/C/edit-domain.page | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 help/meson.build        |  1 +
 2 files changed, 49 insertions(+)
---
diff --git a/help/C/edit-domain.page b/help/C/edit-domain.page
new file mode 100644
index 00000000..cc3d6439
--- /dev/null
+++ b/help/C/edit-domain.page
@@ -0,0 +1,48 @@
+<page xmlns="http://projectmallard.org/1.0/";
+      xmlns:its="http://www.w3.org/2005/11/its";
+      type="topic" style="task"
+      id="edit-domain">
+  <info>
+    <revision pkgversion="40.rc" date="2021-03-10" status="review"/>
+    <link type="guide" xref="index#properties"/>
+
+    <credit type="author copyright">
+      <name>Felipe Borges</name>
+      <email>felipeborges gnome org</email>
+      <years>2021</years>
+    </credit>
+
+    <include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
+
+    <desc>Edit advanced configurations of your box.</desc>
+  </info>
+
+  <title>Edit the Libvirt domain XML configuration of a box</title>
+
+  <comment>
+    <cite date="2021-02-10" href="mailto:felipeborges gnome org">Felipe Borges</cite>
+    <p>This assumes the reader has a basic understanding of libvirt domains and virtualization
+    concepts such as virtual devices. See https://libvirt.org/format.html
+    By the end of this page, the reader will be able to configure their virtual machine beyond
+    what GNOME Boxes exposes in its user interface.</p>
+  </comment>
+
+  <p>Boxes now gives you the ability to manually edit the <sys>Libvirt</sys> XML configuration of
+    your virtual machines. This should allow you to achieve specific setups which are not exposed
+    in the GNOME Boxes interface and neither supported by the GNOME Boxes developers.</p>
+
+  <steps>
+    <title>To edit the Libvirt XML configuration of a box:</title>
+    <item><p>Right-click on the box in the collection view and select
+    <gui>Properties</gui>, or click the menu
+    (<media type="image" src="figures/open-menu-symbolic.svg" its:translate="no"><span 
its:translate="yes">settings</span></media>)
+    button in the header bar and select <gui>Properties</gui>.</p></item>
+    <item><p>Click the <gui>System</gui> tab.</p></item>
+    <item><p>Click the <gui style="button">Edit XML</gui> button to open the configuration
+    editor.</p></item>
+    <item><p>Edit the XML configuration and click <gui style="button">Save</gui>. Boxes will attempt
+    to create a snapshot prior to your changes getting applied, allowing you to revert your
+    configuration in case of a mistake.</p></item>
+    <item><p>In case the virtual machine which has been edited is already running, then, Boxes will show a 
notification asking to restart the running virtual machine.</p></item>
+  </steps>
+</page>
diff --git a/help/meson.build b/help/meson.build
index a5d7bbc1..6ed28285 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -4,6 +4,7 @@ help_files = [
   'create.page',
   'delete.page',
   'disk-images.page',
+  'edit-domain.page',
   'index.page',
   'interface.page',
   'keystrokes.page',