In the rich text editor:
@Leonsby
In a comment:
[Leonsby](https://chowlings.com/user/Leonsby)
For Names and Avatars:
In the rich text editor:
%Leonsby
In a comment:
[![Leonsby's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Leonsby) [Leonsby](https://chowlings.com/user/Leonsby)