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