===== Merge multiple PDF's together =====

Merging multiple PDF's can be done using several programs. I used to use ImageMagick, but it can destroy the resolution. Instead, ghostscript and pdftk provide nice options.

Using pdftk:

<code>pdfunite in1.pdf in2.pdf out.pdf
</code>
Make sure you put out.pdf otherwise it will overwrite the last file!
This has no loss in resolution (unlike the ghostscript version).