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.