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In general, we recommend that you use TeX to format the document and
print sections of it, by running tex on the Texinfo source file.
However, you may wish to print out the contents of a node as a quick
reference document for later use, or if you don't have TeX installed.
Info provides you with a command for doing this.
INFO_PRINT_COMMAND. If the variable does not
exist, the node is simply piped to lpr (on DOS/Windows, the
default is to print the node to the local printer device, PRN).
The value of INFO_PRINT_COMMAND may begin with the `>'
character, as in `>/dev/printer', in which case Info treats the
rest as the name of a file or a device. Instead of piping to a command,
Info opens the file, writes the node contents, and closes the file,
under the assumption that text written to that file will be printed by
the underlying OS.