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