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