In the rich text editor:
@Nex_bugg21
In a comment:
[Nex_bugg21](https://chowlings.com/user/Nex_bugg21)
For Names and Avatars:
In the rich text editor:
%Nex_bugg21
In a comment:
[![Nex_bugg21's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Nex_bugg21) [Nex_bugg21](https://chowlings.com/user/Nex_bugg21)