gnome-control-center/capplets/screensaver/screensavers/drift.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="drift">

    <command arg="-root"/>

    <number label="Number of Colors." low-label="Colors:" id="colors"
            type="spinbutton" default="200" arg="-ncolors %" low="1"
            high="256"/>

    <number label="Speed of Motion." low-label="Faster" id="delay"
            type="slider" default="2" arg="-delay %" low="1"
            high-label="Slower" high="500000"/>

    <number label="Number of pixels to use." low-label="Count:"
            id="count" type="spinbutton" default="1000" arg="-count %"
            low="1" high="5000"/>

    <boolean label="Fractals should grow." arg-unset="-no-grow"
             id="grow" arg-set="-grow"/>

    <boolean label="Display screensaver in monochrome." arg-unset=""
             id="monochrome" test="mono" arg-set="-mono"/>

    <boolean label="Use lissajous figures to get points."
             arg-unset="-no-liss" id="lissajous" arg-set="-liss"/>

</screensaver>