mupdf/docs/tools/mutool-poster.rst
The poster command reads the input PDF file and for each page chops it up into x by y pieces. Each piece becomes its own page in the output PDF file. This makes it possible for each page to be printed upscaled and can then be merged into a large poster.
.. code-block:: bash
mutool poster [options] input.pdf [output.pdf]
[options]
Options are as follows:
``-p`` password
Use the specified password if the file is encrypted.
``-m`` margin
Set the margin (overlap) between pages in points or percent.
``-x`` x decimation factor
Pieces to horizontally divide each page into.
``-y`` y decimation factor
Pieces to vertically divide each page into.
``-r``
Split horizontally from right to left (default splits from left to right).
input.pdf
The input PDF document.
[output.pdf]
The output filename. Defaults to "out.pdf" if not supplied.