us­r­guide – User-mode doc­u­men­ta­tion for LaTeX

Doc­u­men­ta­tion of user com­mands (other than font-han­dling com­mands) that dif­fer in la­tex 2e from what ap­peared in the now ob­so­lete la­tex 2.09.
Part of a set of doc­u­men­ta­tion that also cov­ers font-han­dling, class and pack­age writ­ing, type­set­ting Cyril­lic, LaTeX font en­cod­ings, con­fig­u­ra­tion op­tions and mod­i­fi­ca­tion of la­tex.