unset_preferred

unset_preferred_layers
[ -net {s_netName…} | -set d_setObj ] 
[ -rule_spec s_ruleSpec ]

Removes the p referred routing layers for the given nets, objects in the given set, or the given rule spec.

`-net` {s_netName…}	Removes the preferred routing layers for the given nets.
`-rule_spec` s_ruleSpec
	Removes the preferred routing layers only on the given rule spec.
`-set` d_setObj	Removes the preferred routing layers for objects in the given set.