It is Official information maintained by/for NCsoft's Licencees in EU/RU region, so it is not 100% accurate for us... lots of stuff from their severs have been nerfed or completely removed here. We used to have a sub-par library section before they migrated Forums, and overhauled the website, now for any past/future NCsoft info you need to translate the Korean official site.
When you open in Game Help, Alt+X > click Help button... expand "Intermediate Player Info" and List of Commands is the last subject in the section.