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