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