 As the majority of modern players follow the practices of angling the stroke of the finger - it may be considered that the left tip of the nail (viewed from above palm down) can be shaped and tapered to facilitate the release of the string after plucking.This involves filing the nail so that it presents a profile where the curve of the tip almost joins the finger smoothly on the left, and increases away from the finger to the right.For those players following the technique of using the right side of the finger (an approach popularized by the guitarists Ida Presti and Alexander Lagoya) - the opposite would apply.