Does anyone know if there is a way to control the order parts are numbered on a nested sheet?

Right now they seem to be numbered going left to right starting from the origin.  I was wondering if there was a way to get the parts to number top to bottom?  We just purchased a machine with an offloader, so now the operator stands on the side of the table instead of the front, and it would be helpful if we could get the labels to print in the order he will be unloading parts.