Hi there, With the current ess-swv.el in emacs-ess 5.3.3 it is hard to switch the name of latex command, e.g. from latex to platex. There is no way but modifying the ess-swv.el directly. It is happy if we can easily redefine variables referring the name of latex command, dviware, and postscript/pdf viewer. -- Susumu Tanimura