Nev. Rev. Stat. § 133.180
When any share of the estate of a testator is assigned to a child born after the making of a will, or to a child or the issue of a child omitted in the will, as mentioned in NRS 133.160 and 133.170, the share must first be taken from the estate not disposed of by the will, if any. If that is not sufficient, so much as is necessary must be taken from all the devisees in proportion to the value they may respectively receive under the will, unless the obvious intention of the testator in relation to some specific devise or other provision in the will would thereby be defeated. In that case, the specific devise or provision may be exempted from the apportionment, and a different apportionment, consistent with the intention of the testator, may be adopted.
NRS 133.180