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pstops
is a filter that is used to convert
application/postscript
to
application/vnd.cups-postscript
. As stated earlier, this filter inserts all
device-specific print options (commands to the printer to ask for the duplexing of output, or stapling and
punching it, and so on) into the PostScript file. An example is illustrated in
Adding Device-Specific Print Options.
This is not all. Other tasks performed by it are:
-
Selecting the range of pages to be printed (e.g., you can choose to
print only pages “3, 6, 8-11, 16, and 19-21”, or only odd-numbered
pages).
-
Putting two or more logical pages on one sheet of paper (the
so-called “number-up” function).
-
Counting the pages of the job to insert the accounting
information into the /var/log/cups/page_log.
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