Useful notes for some of my answers:
CTAN lion drawing by Duane Bibby.
How do you accept an answer?](http://meta.tex.stackexchange.com/q/1852/3954)
minimal working example](http://www.minimalbeispiel.de/mini-en.html)
demo option for
graphicx simply replaces actual figures with black rectangles; do not use that option in your actual document.
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