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