Edit file File name : org.gnome.desktop.background.gschema.xml Content :<?xml version="1.0" encoding="UTF-8"?> <schemalist gettext-domain="gsettings-desktop-schemas"> <schema id="org.gnome.desktop.background" path="/org/gnome/desktop/background/"> <key name="draw-background" type="b"> <default>true</default> <summary>Draw Desktop Background</summary> <description> Have GNOME draw the desktop background. DEPRECATED: This key is deprecated and ignored. </description> </key> <key name="picture-options" enum="org.gnome.desktop.GDesktopBackgroundStyle"> <default>'zoom'</default> <summary>Picture Options</summary> <description> Determines how the image set by wallpaper_filename is rendered. Possible values are “none”, “wallpaper”, “centered”, “scaled”, “stretched”, “zoom”, “spanned”. </description> </key> <key name="picture-uri" type="s"> <default>'file:///usr/share/backgrounds/gnome/adwaita-timed.xml'</default> <summary>Picture URI</summary> <description> URI to use for the background image. Note that the backend only supports local (file://) URIs. </description> </key> <key name="picture-opacity" type="i"> <range min="0" max="100"/> <default>100</default> <summary>Picture Opacity</summary> <description> Opacity with which to draw the background picture. </description> </key> <key name="primary-color" type="s"> <default>'#023c88'</default> <summary>Primary Color</summary> <description> Left or Top color when drawing gradients, or the solid color. </description> </key> <key name="secondary-color" type="s"> <default>'#5789ca'</default> <summary>Secondary Color</summary> <description> Right or Bottom color when drawing gradients, not used for solid color. </description> </key> <key name="color-shading-type" enum="org.gnome.desktop.GDesktopBackgroundShading"> <default>'solid'</default> <summary>Color Shading Type</summary> <description> How to shade the background color. Possible values are “horizontal”, “vertical”, and “solid”. </description> </key> <key name="show-desktop-icons" type="b"> <default>false</default> <summary>Have file manager handle the desktop</summary> <description> If set to true, then file manager will draw the icons on the desktop. </description> </key> </schema> </schemalist> Save