In the rich text editor:
@Fried_Boba
In a comment:
[Fried_Boba](https://chowlings.com/user/Fried_Boba)
For Names and Avatars:
In the rich text editor:
%Fried_Boba
In a comment:
[![Fried_Boba's Avatar](https://chowlings.com/images/avatars/461.png?v=1644063295)](https://chowlings.com/user/Fried_Boba) [Fried_Boba](https://chowlings.com/user/Fried_Boba)