In the rich text editor:
@Cheerio
In a comment:
[Cheerio](https://chowlings.com/user/Cheerio)
For Names and Avatars:
In the rich text editor:
%Cheerio
In a comment:
[![Cheerio's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Cheerio) [Cheerio](https://chowlings.com/user/Cheerio)