All the Postscript hardcopy commands use the variables
ps-lpr-command and ps-lpr-switches to specify how to print
the output.  ps-lpr-command specifies the command name to run,
ps-lpr-switches specifies command line options to use, and
ps-printer-name specifies the printer.  If you don't set the
first two variables yourself, they take their initial values from
lpr-command and lpr-switches.  If ps-printer-name
is nil, printer-name is used.
  The variable ps-print-header controls whether these commands
add header lines to each page--set it to nil to turn headers
off.  You can turn off color processing by setting
ps-print-color-p to nil.
  The variable ps-paper-type specifies which size of paper to
format for; legitimate values include a4, a3,
a4small, b4, b5, executive, ledger,
legal, letter, letter-small, statement,
tabloid.  The default is letter.  You can define
additional paper sizes by changing the variable
ps-page-dimensions-database.
  The variable ps-landscape-mode specifies the orientation of
printing on the page.  The default is nil, which stands for
"portrait" mode.  Any non-nil value specifies "landscape"
mode.
  The variable ps-number-of-columns specifies the number of
columns; it takes effect in both landscape and portrait mode.  The
default is 1.
  The variable ps-font-family specifies which font family to use
for printing ordinary text.  Legitimate values include Courier,
Helvetica, NewCenturySchlbk, Palatino and
Times.  The variable ps-font-size specifies the size of
the font for ordinary text.  It defaults to 8.5 points.
Many other customization variables for these commands are defined and described in the Lisp file `ps-print.el'.
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