In the rich text editor:
@beaniepudge
In a comment:
[beaniepudge](https://chowlings.com/user/beaniepudge)
For Names and Avatars:
In the rich text editor:
%beaniepudge
In a comment:
[](https://chowlings.com/user/beaniepudge) [beaniepudge](https://chowlings.com/user/beaniepudge)