Sketchbook PRO 2015: perspective sketching tools

A quick overview of the perspective drawing tools I helped Autodesk create for Sketchbook PRO 2015. link to SBP 2015 - link to How to Draw book - =s9_qpp_gw_p14_d84_i2?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-3&pf_rd_r=1D9XJZE07XH05BEVMTCR&pf_rd_t=101&pf_rd_p=1688200422&pf_rd_i=507846