At what level of the TeX system heirarchy is \newcommand? Where do I find documentation for these kinds of macros (e.g. \renewcommand, \def, \parskip, etc.)?
My objective is that I will be able to take an existing package or document class and customize it to my needs.
As much as possible, kindly point me to a free online resource. Bookstores here in the Philippines do not have LaTeX in their vocabulary.
Best Answer
Try also the not-so-short introduction to latex. Section 6.1 talks about
\newcommandet al.