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texdoc beamer
文件目录
$ find /usr/local/texlive/2019 -name "beamer" -type d
/usr/local/texlive/2019/texmf-dist/doc/latex/beamer
/usr/local/texlive/2019/texmf-dist/doc/latex/presentations-en/images/beamer
/usr/local/texlive/2019/texmf-dist/doc/latex/presentations/images/beamer
/usr/local/texlive/2019/texmf-dist/tex/latex/beamer
