<boolean id="wander" _label="Wander" arg-unset="-no-wander"/>
<boolean id="spin" _label="Spin" arg-unset="-no-spin"/>
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
+ <boolean id="titles" _label="Show titles" arg-unset="-no-titles"/>
</hgroup>
<select id="block">