This article is from the MachTen & CodeBuilder FAQ, by Jaime Julca email@example.com with numerous contributions by others.
You can view .info files with emacs: type meta-x info and hit return, and it
will bring up lots of interesting information, including tutorials. (The
meta key is usually your escape key.) Alternatively, you can view it using
TeXinfo. Both emacs and TeXinfo are available on the Ported Apps CD.