ps­frag – Re­place strings in en­cap­su­lated PostScript fig­ures

Al­lows LaTeX con­struc­tions (equa­tions, pic­ture en­vi­ron­ments, etc.) to be pre­cisely su­per­im­posed over En­cap­su­lated PostScript fig­ures, us­ing your own fa­vorite draw­ing tool to cre­ate an EPS fig­ure and plac­ing sim­ple text ‘tags’ where each re­place­ment is to be placed, with PSfrag au­to­mat­i­cally re­mov­ing these tags from the fig­ure and re­plac­ing them with a user spec­i­fied LaTeX con­struc­tion, prop­erly aligned, scaled, and/or ro­tated.