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