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/usr/share/glib-2.0/schemas/org.gnome.desktop.wm.preferences.gschema.xml is in gsettings-desktop-schemas 3.10.1-0ubuntu1.

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<?xml version="1.0" encoding="UTF-8"?>
<schemalist>

  <schema path="/org/gnome/desktop/wm/preferences/" id="org.gnome.desktop.wm.preferences" gettext-domain="gsettings-desktop-schemas">
    <key type="s" name="mouse-button-modifier">
      <default><![CDATA['<Super>']]></default>
      <summary>Modifier to use for modified window click actions</summary>
      <description>Clicking a window while holding down this modifier key will move the window (left click), resize the window (middle click), or show the window menu (right click). The middle and right click operations may be swapped using the "resize-with-right-button" key. Modifier is expressed as <![CDATA["<Alt>"]]> or <![CDATA["<Super>"]]> for example.</description>
    </key>
    <key type="b" name="resize-with-right-button">
      <default>false</default>
      <summary>Whether to resize with the right button</summary>
      <description>Set this to true to resize with the right button and show a menu with the middle button while holding down the key given in "mouse-button-modifier"; set it to false to make it work the opposite way around.</description>
    </key>
    <key type="s" name="button-layout">
      <default>':minimize,maximize,close'</default>
      <summary>Arrangement of buttons on the titlebar</summary>
      <description>Arrangement of buttons on the titlebar. The value should be a string, such as "menu:minimize,maximize,spacer,close"; the colon separates the left corner of the window from the right corner, and the button names are comma-separated. Duplicate buttons are not allowed. Unknown button names are silently ignored so that buttons can be added in future metacity versions without breaking older versions. A special spacer tag can be used to insert some space between two adjacent buttons.</description>
    </key>
    <key name="focus-mode" enum="org.gnome.desktop.GDesktopFocusMode">
      <default>'click'</default>
      <summary>Window focus mode</summary>
      <description>The window focus mode indicates how windows are activated. It has three possible values; "click" means windows must be clicked in order to focus them, "sloppy" means windows are focused when the mouse enters the window, and "mouse" means windows are focused when the mouse enters the window and unfocused when the mouse leaves the window.</description>
    </key>
    <key name="focus-new-windows" enum="org.gnome.desktop.GDesktopFocusNewWindows">
      <default>'smart'</default>
      <summary>Control how new windows get focus</summary>
      <description>This option provides additional control over how newly created windows get focus. It has two possible values; "smart" applies the user's normal focus mode, and "strict" results in windows started from a terminal not being given focus.</description>
    </key>
    <key type="b" name="raise-on-click">
      <default>true</default>
      <summary>Whether raising should be a side-effect of other user interactions</summary>
      <description>Setting this option to false can lead to buggy behavior, so users are strongly discouraged from changing it from the default of true. Many actions (e.g. clicking in the client area, moving or resizing the window) normally raise the window as a side-effect. Setting this option to false, which is strongly discouraged, will decouple raising from other user actions, and ignore raise requests generated by applications. See http://bugzilla.gnome.org/show_bug.cgi?id=445447#c6. Even when this option is false, windows can still be raised by an alt-left-click anywhere on the window, a normal click on the window decorations, or by special messages from pagers, such as activation requests from tasklist applets. This option is currently disabled in click-to-focus mode. Note that the list of ways to raise windows when raise-on-click is false does not include programmatic requests from applications to raise windows; such requests will be ignored regardless of the reason for the request. If you are an application developer and have a user complaining that your application does not work with this setting disabled, tell them it is -their- fault for breaking their window manager and that they need to change this option back to true or live with the "bug" they requested.</description>
    </key>
    <key name="action-double-click-titlebar" enum="org.gnome.desktop.GDesktopTitlebarAction">
      <default>'toggle-maximize'</default>
      <summary>Action on title bar double-click</summary>
      <description>This option determines the effects of double-clicking on the title bar. Current valid options are 'toggle-shade', which will shade/unshade the window, 'toggle-maximize' which will maximize/unmaximize the window, 'toggle-maximize-horizontally' and 'toggle-maximize-vertically' which will maximize/unmaximize the window in that direction only, 'minimize' which will minimize the window, 'shade' which will roll the window up, 'menu' which will display the window menu, 'lower' which will put the window behind all the others, and 'none' which will not do anything.</description>
      
      <aliases>
        <alias value="toggle_shade" target="toggle-shade"/>
        <alias value="toggle_maximize" target="toggle-maximize"/>
        <alias value="toggle_maximize_horizontally" target="toggle-maximize-horizontally"/>
        <alias value="toggle_maximize_vertically" target="toggle-maximize-vertically"/>
      </aliases>
    </key>
    <key name="action-middle-click-titlebar" enum="org.gnome.desktop.GDesktopTitlebarAction">
      <default>'lower'</default>
      <summary>Action on title bar middle-click</summary>
      <description>This option determines the effects of middle-clicking on the title bar. Current valid options are 'toggle-shade', which will shade/unshade the window, 'toggle-maximize' which will maximize/unmaximize the window, 'toggle-maximize-horizontally' and 'toggle-maximize-vertically' which will maximize/unmaximize the window in that direction only, 'minimize' which will minimize the window, 'shade' which will roll the window up, 'menu' which will display the window menu, 'lower' which will put the window behind all the others, and 'none' which will not do anything.</description>
      
      <aliases>
        <alias value="toggle_shade" target="toggle-shade"/>
        <alias value="toggle_maximize" target="toggle-maximize"/>
        <alias value="toggle_maximize_horizontally" target="toggle-maximize-horizontally"/>
        <alias value="toggle_maximize_vertically" target="toggle-maximize-vertically"/>
      </aliases>
    </key>
    <key name="action-right-click-titlebar" enum="org.gnome.desktop.GDesktopTitlebarAction">
      <default>'menu'</default>
      <summary>Action on title bar right-click</summary>
      <description>This option determines the effects of right-clicking on the title bar. Current valid options are 'toggle-shade', which will shade/unshade the window, 'toggle-maximize' which will maximize/unmaximize the window, 'toggle-maximize-horizontally' and 'toggle-maximize-vertically' which will maximize/unmaximize the window in that direction only, 'minimize' which will minimize the window, 'shade' which will roll the window up, 'menu' which will display the window menu, 'lower' which will put the window behind all the others, and 'none' which will not do anything.</description>
      
      <aliases>
        <alias value="toggle_shade" target="toggle-shade"/>
        <alias value="toggle_maximize" target="toggle-maximize"/>
        <alias value="toggle_maximize_horizontally" target="toggle-maximize-horizontally"/>
        <alias value="toggle_maximize_vertically" target="toggle-maximize-vertically"/>
      </aliases>
    </key>
    <key type="b" name="auto-raise">
      <default>false</default>
      <summary>Automatically raises the focused window</summary>
      <description>If set to true, and the focus mode is either "sloppy" or "mouse" then the focused window will be automatically raised after a delay specified by the auto-raise-delay key. This is not related to clicking on a window to raise it, nor to entering a window during drag-and-drop.</description>
    </key>
    <key type="i" name="auto-raise-delay">
      <range min="0" max="10000"/>
      <default>500</default>
      <summary>Delay in milliseconds for the auto raise option</summary>
      <description>The time delay before raising a window if auto-raise is set to true. The delay is given in thousandths of a second.</description>
    </key>
    <key type="s" name="theme">
      <default>'Adwaita'</default>
      <summary>Current theme</summary>
      <description>The theme determines the appearance of window borders, titlebar, and so forth.</description>
    </key>
    <key type="b" name="titlebar-uses-system-font">
      <default>false</default>
      <summary>Use standard system font in window titles</summary>
      <description>If true, ignore the titlebar-font option, and use the standard application font for window titles.</description>
    </key>
    <key type="s" name="titlebar-font">
      <default>'Cantarell Bold 11'</default>
      <summary>Window title font</summary>
      <description>A font description string describing a font for window titlebars. The size from the description will only be used if the titlebar-font-size option is set to 0. Also, this option is disabled if the titlebar-uses-desktop-font option is set to true.</description>
    </key>
    <key type="i" name="num-workspaces">
      <default>4</default>
      <range min="1" max="36"/>
      <summary>Number of workspaces</summary>
      <description>Number of workspaces. Must be more than zero, and has a fixed maximum to prevent making the desktop unusable by accidentally asking for too many workspaces.</description>
    </key>
    <key type="b" name="audible-bell">
      <default>true</default>
      <summary>System Bell is Audible</summary>
      <description>Determines whether applications or the system can generate audible 'beeps'; may be used in conjunction with 'visual bell' to allow silent 'beeps'.</description>
    </key>
    <key type="b" name="visual-bell">
      <default>false</default>
      <summary>Enable Visual Bell</summary>
      <description>Turns on a visual indication when an application or the system issues a 'bell' or 'beep'; useful for the hard-of-hearing and for use in noisy environments.</description>
    </key>
    <key name="visual-bell-type" enum="org.gnome.desktop.GDesktopVisualBellType">
      <default>'fullscreen-flash'</default>
      <summary>Visual Bell Type</summary>
      <description>Tells the WM how to implement the visual indication that the system bell or another application 'bell' indicator has been rung. Currently there are two valid values, "fullscreen-flash", which causes a fullscreen white-black flash, and "frame-flash" which causes the titlebar of the application which sent the bell signal to flash. If the application which sent the bell is unknown (as is usually the case for the default "system beep"), the currently focused window's titlebar is flashed.</description>
      
      <aliases>
        <alias value="fullscreen" target="fullscreen-flash"/>
        <alias value="frame_flash" target="frame-flash"/>
      </aliases>
    </key>
    <key type="b" name="application-based">
      <default>false</default>
      <summary>(Not implemented) Navigation works in terms of applications not windows</summary>
      <description>If true, then the WM works in terms of applications rather than windows. The concept is a bit abstract, but in general an application-based setup is more like the Mac and less like Windows. When you focus a window in application-based mode, all the windows in the application will be raised. Also, in application-based mode, focus clicks are not passed through to windows in other applications. Application-based mode is, however, largely unimplemented at the moment.</description>
    </key>
    <key type="b" name="disable-workarounds">
      <default>false</default>
      <summary>Disable misfeatures that are required by old or broken applications</summary>
      <description>Some applications disregard specifications in ways that result in window manager misfeatures. This option puts the WM in a rigorously correct mode, which gives a more consistent user interface, provided one does not need to run any misbehaving applications.</description>
    </key>
    <key type="as" name="workspace-names">
      <default>[]</default>
      <summary>The names of the workspaces</summary>
      <description>Defines the names that should be assigned to workspaces. If the list is too long for the current number of workspaces, names in excess will be ignored. If the list is too short, or includes empty names, missing values will be replaced with the default ("Workspace N").</description>
    </key>
  </schema>

</schemalist>