<number id="tvcontrast" type="slider" arg="-tv-contrast %"
_label="Contrast Knob" _low-label="Low" _high-label="High"
low="0" high="1500" default="1000"/>
<number id="tvcontrast" type="slider" arg="-tv-contrast %"
_label="Contrast Knob" _low-label="Low" _high-label="High"
low="0" high="1500" default="1000"/>