How should functions be organised?

[matt-dray]

At time of writing, I've split the functions into three groups on the website reference page: there are loosely divs (i.e. fenced with :::), classes (e.g. slide layout helpers, like {.smaller}) and 'other' (e.g. . . .). These are all things you insert into the body of your document.

I don't think the wording is useful or helpful. What's the easiest, most correct, most user-friendly way of presenting this different 'types of things'?