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Edit File: backgrounds-extra.page

<credit type="author copyright">
 <name>Matthias Clasen</name>
 <email>matthias.clasen@gmail.com</email>
 <years>2012</years>
 </credit>
 <credit type="editor">
 <name>Jana Svarova</name>
 <email>jana.svarova@gmail.com</email>
 <years>2013</years>
 </credit>
 <credit type="editor">
 <name>Petr Kovar</name>
 <email>pknbe@volny.cz</email>
 <years>2019</years>
 </credit>

<desc>How do I make extra backgrounds available to my users?</desc>
 </info>

<title>Add extra backgrounds</title>

You can make extra backgrounds available to users on your system by
 following the steps below.

<steps>
 <title>Set extra backgrounds</title>
 <item>
 Create an XML file, for example <file><var>filename</var>.xml</file>.
 In this file, use keys from the <sys>org.gnome.desktop.background</sys>
 GSettings schema to specify extra backgrounds and their appearance.

Below is a list of the most frequently used keys:

<table frame="top bottom" rules="all" shade="rows">
 <title>org.gnome.desktop.background schemas GSettings keys</title>
 <tbody>
 <tr>
 <td>Key name</td>
 <td>Possible values</td>
 <td>Description</td>
 </tr>
 <tr>
 <td>picture-options</td>
 <td>"none", "wallpaper", "centered", "scaled", "stretched", "zoom", "spanned"</td>
 <td>Determines how the image set by <var>wallpaper_filename</var> is rendered.</td>
 </tr>
 <tr>
 <td>color-shading-type</td>
 <td>"horizontal", "vertical", and "solid"</td>
 <td>How to shade the background color.</td>
 </tr>
 <tr>
 <td>primary-color</td>
 <td>default: #023c88</td>
 <td>Left or top color when drawing gradients, or the solid color.</td>
 </tr>
 <tr>
 <td>secondary-color</td>
 <td>default: #5789ca</td>
 <td>Right or bottom color when drawing gradients, not used for solid color.</td>
 </tr>
 </tbody>
 </table>

You can view a complete list of <sys>org.gnome.desktop.background</sys>
 keys and possible values using <app>dconf-editor</app> or the <cmd>gsettings</cmd>
 command-line utility. See <link xref="gsettings-browse"/> for more information.
 
 Below is a sample <file><var>filename</var>.xml</file> file:

<code mime="application/xml"><![CDATA[
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
<wallpapers>
 <wallpaper deleted="false">
 <name>Company Background</name>
 <name xml:lang="de">Firmenhintergrund</name>
 <filename>/usr/local/share/backgrounds/company-wallpaper.jpg</filename>
 <options>zoom</options>
 <shade_type>solid</shade_type>
 <pcolor>#ffffff</pcolor>
 <scolor>#000000</scolor>
 </wallpaper>
</wallpapers>
]]>
</code>

</item>
 <item>
 Place the <file><var>filename</var>.xml</file> file in the
 <file>/usr/share/gnome-background-properties/</file> directory.
 Users will have the extra backgrounds available for configuration from
 <guiseq><gui>Settings</gui> <gui>Background</gui></guiseq>.
 </item>
 </steps>

<section id="backgrounds-extra-two-wallpapers">
 <title>Specify multiple backgrounds</title>
 In one configuration file, you can specify multiple
 <code><wallpaper></code> elements to add more backgrounds.
 See the following example with two <code><wallpaper></code> elements,
 adding two different backgrounds:

<code mime="application/xml"><![CDATA[
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
<wallpapers>
 <wallpaper deleted="false">
 <name>Company Background</name>
 <name xml:lang="de">Firmenhintergrund</name>
 <filename>/usr/local/share/backgrounds/company-wallpaper.jpg</filename>
 <options>zoom</options>
 <shade_type>solid</shade_type>
 <pcolor>#ffffff</pcolor>
 <scolor>#000000</scolor>
 </wallpaper>
 <wallpaper deleted="false">
 <name>Company Background 2</name>
 <name xml:lang="de">Firmenhintergrund 2</name>
 <filename>/usr/local/share/backgrounds/company-wallpaper-2.jpg</filename>
 <options>zoom</options>
 <shade_type>solid</shade_type>
 <pcolor>#ff0000</pcolor>
 <scolor>#00ffff</scolor>
 </wallpaper>
</wallpapers>
]]></code>

</section>
</page>