As an alternative to using the DUPLEX command in the printer init file, there is now a //DUPLEX command that can be embedded in the printfile itself, provided it is in one of the top four lines of the file. The options are same as for the printer init command DUPLEX=option, i.e. V{ert}, H{orz}, L{ong}, S{hort}, F{alse}, N{one}, 0. (0 = zero = None = False = Simplex). The most common DUPLEX option is to prepare for binding along the left vertical (long) edge, i.e. //DUPLEX,VERT or //DUPLEX,LONG.
Note that this simply has the same effect as if the equivalent DUPLEX command had been in the printer init file (and overrides any DUPLEX command that was in the printer init file).
Any //DUPLEX commands farther into the file will be ignored (since we are not yet capable of, and may never be, changing the duplex options in the middle of a document.
