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