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Additional packages
Load a package pkg, with the package options given in the comma-separated list options, as here.
\usepackage[options]{pkg}.
To specify more than one package you can separate them with a comma, as in \usepackage{pkg1,pkg2,...}, or use multiple \usepackage commands.
Any options given in the \documentclass command that are unknown to the selected document class are passed on to the packages loaded with \usepackage.
© 2007–2018 Karl Berry
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http://latexref.xyz/Additional-packages.html