<boolean id="xsymmetry" _label="With X Symmetry" arg-unset="-no-xsymmetry"/>
<boolean id="ysymmetry" _label="With Y Symmetry" arg-set="-ysymmetry"/>
<boolean id="xsymmetry" _label="With X Symmetry" arg-unset="-no-xsymmetry"/>
<boolean id="ysymmetry" _label="With Y Symmetry" arg-set="-ysymmetry"/>