<varlistentry id="options.KillBackgroundThreshold">
	<term>KillBackgroundThreshold</term>
	<listitem>
		<para>Here <size> is the maximum number of pixels in root
		background image. If image is bigger that this - it will be
		unloaded from memory when desktop is switched and image is no
		longer in use. Use it on systems with low memory.</para>
	</listitem>
</varlistentry>
