In the rich text editor:
@Suko
In a comment:
[Suko](https://chowlings.com/user/Suko)
For Names and Avatars:
In the rich text editor:
%Suko
In a comment:
[![Suko's Avatar](https://chowlings.com/images/avatars/2234.jpeg?v=1681856635)](https://chowlings.com/user/Suko) [Suko](https://chowlings.com/user/Suko)