[magick-users] pdf color invert?

[duc.sequere.aut.de.via.decede at imagemagick.org]

>  mogrify -negate DDDoA.sml.pdf

Don't save back to PDF, instead use this command:

  convert -density 400 DDDoA.sml.pdf -resize 25% -negate DDDoA.sml.png
  display DDDoA.sml.png