Definitions

LaTeX has support for making new commands of many different kinds.

• \newcommand & \renewcommand
• \providecommand
• \makeatletter & \makeatother
• \@ifstar
• \newcounter: Allocating a counter
• \newlength
• \newsavebox
• \newenvironment & \renewenvironment
• \newtheorem
• \newfont
• \protect
• \ignorespaces & \ignorespacesafterend
• xspace package