In the rich text editor:
@booplet
In a comment:
[booplet](https://chowlings.com/user/booplet)
For Names and Avatars:
In the rich text editor:
%booplet
In a comment:
[![booplet's Avatar](https://chowlings.com/images/avatars/298.jpg?v=1696173068)](https://chowlings.com/user/booplet) [booplet](https://chowlings.com/user/booplet)