Moving limb behind body

I am using pivots to animate arms, but when I put the two limbs as children of the body, they both appear in the foreground. How do I put one limb behind the body and keep the other on top?

Besides ordering elements in the timeline heirarchy you also can order them along the Z axis in 3D space. Take a look at this page in the Cartooning in Toon Boom WIKI -JK