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