<hgroup>
<boolean id="fisheye" _label="Fisheye lens" arg-unset="-no-fisheye"/>
<boolean id="tight" _label="Allow tight turns" arg-set="-tightturns"/>
<hgroup>
<boolean id="fisheye" _label="Fisheye lens" arg-unset="-no-fisheye"/>
<boolean id="tight" _label="Allow tight turns" arg-set="-tightturns"/>