This document summarizes the reasons for creating a new edition of Heitor Villa-Lobos's "Doze Estudos para Violão". The original editions contained almost no fingering indications and notations were inconsistent. The new edition addresses these issues by adding detailed fingering, standardizing harmonic and repeat notations, and correcting errors. It aims to make the studies easier for a broad range of guitarists to play while preserving the composer's intentions as closely as possible.