In the rich text editor:
@bonito
In a comment:
[bonito](https://chowlings.com/user/bonito)
For Names and Avatars:
In the rich text editor:
%bonito
In a comment:
[![bonito's Avatar](https://chowlings.com/images/avatars/498.png?v=1644063301)](https://chowlings.com/user/bonito) [bonito](https://chowlings.com/user/bonito)