LaTeXManual

A free reference manual for LaTeX2e in the CTAN is written in GNU Texinfo, and available in Info, PDF, and HTML:

https://www.ctan.org/tex-archive/info/latex2e-help-texinfo

There’s also another free user manual for LaTeX, started six years ago, in 1999. It is far from completion, but has some interesting commentary and a great command reference appendix. It is written in GNU Texinfo and is availble as a helpful Emacs InfoMode. PDF versions are also available:

http://users.ninthfloor.org/~ashawley/gnu/latex/

The documentation’s project page, that has been stale since 2002, is here:

https://savannah.nongnu.org/projects/latex-manual/

There’s a more complete free manual on LaTeX available from the India TeX Users Group (TUG). Unfortunately, it was written in LaTeX of all things:

http://www.tug.org.in/tutorials.html


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