In the rich text editor:
@swissburger
In a comment:
[swissburger](https://chowlings.com/user/swissburger)
For Names and Avatars:
In the rich text editor:
%swissburger
In a comment:
[![swissburger's Avatar](https://chowlings.com/images/avatars/2073.png?v=1678444659)](https://chowlings.com/user/swissburger) [swissburger](https://chowlings.com/user/swissburger)