You can include headers when you run Dvips, as well as from your document (see the previous section). To do this, run Dvips with the option `-P header'; this will read the file `config.header', which in turn can specify a header file to be downloaded with the `h' option. See section Configuration file commands.
You can arrange for the same file to serve as a `-P' config file and the downloadable header file, by starting the lines of PostScript code with a space, leaving only the `h' line and any comments starting in the first column. As an example, see `contrib/volker/config.*'. (These files also perform useful functions: controlling duplex/simplex mode on duplex printers, and setting various screen frequencies; `contrib/volker/README' explains further.)