==== PDF notes ====


**info**

''pdfimages -l input.pdf''

**flatten**

''pdf2ps orig.pdf - | ps2pdf - flattened.pdf''

**compress & convert**

''gs -sDEVICE=pdfwrite -dColorConversionStrategy=/sRGB -dColorImageResolution=150 -q -o output.rgb.150dpi.pdf input.cmyk.pdf''